21038035980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{997}}^1\times {\mathrm{2081}}^1$

素因数の和:3116

約数の個数: 144

約数和(自身を含む): 63880989984

約数和(自身を除く): 42842954004

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 78, 130, 156, 169, 195, 260, 338, 390, 507, 676, 780, 845, 997, 1014, 1690, 1994, 2028, 2081, 2535, 2991, 3380, 3988, 4162, 4985, 5070, 5982, 6243, 8324, 9970, 10140, 10405, 11964, 12486, 12961, 14955, 19940, 20810, 24972, 25922, 27053, 29910, 31215, 38883, 41620, 51844, 54106, 59820, 62430, 64805, 77766, 81159, 108212, 124860, 129610, 135265, 155532, 162318, 168493, 194415, 259220, 270530, 324636, 336986, 351689, 388830, 405795, 505479, 541060, 673972, 703378, 777660, 811590, 842465, 1010958, 1055067, 1406756, 1623180, 1684930, 1758445, 2021916, 2074757, 2110134, 2527395, 3369860, 3516890, 4149514, 4220268, 5054790, 5275335, 6224271, 7033780, 8299028, 10109580, 10373785, 10550670, 12448542, 20747570, 21101340, 24897084, 26971841, 31121355, 41495140, 53943682, 62242710, 80915523, 107887364, 124485420, 134859205, 161831046, 269718410, 323662092, 350633933, 404577615, 539436820, 701267866, 809155230, 1051901799, 1402535732, 1618310460, 1753169665, 2103803598, 3506339330, 4207607196, 5259508995, 7012678660, 10519017990, 21038035980]

約数ペア:

[(1, 21038035980), (2, 10519017990), (3, 7012678660), (4, 5259508995), (5, 4207607196), (6, 3506339330), (10, 2103803598), (12, 1753169665), (13, 1618310460), (15, 1402535732), (20, 1051901799), (26, 809155230), (30, 701267866), (39, 539436820), (52, 404577615), (60, 350633933), (65, 323662092), (78, 269718410), (130, 161831046), (156, 134859205), (169, 124485420), (195, 107887364), (260, 80915523), (338, 62242710), (390, 53943682), (507, 41495140), (676, 31121355), (780, 26971841), (845, 24897084), (997, 21101340), (1014, 20747570), (1690, 12448542), (1994, 10550670), (2028, 10373785), (2081, 10109580), (2535, 8299028), (2991, 7033780), (3380, 6224271), (3988, 5275335), (4162, 5054790), (4985, 4220268), (5070, 4149514), (5982, 3516890), (6243, 3369860), (8324, 2527395), (9970, 2110134), (10140, 2074757), (10405, 2021916), (11964, 1758445), (12486, 1684930), (12961, 1623180), (14955, 1406756), (19940, 1055067), (20810, 1010958), (24972, 842465), (25922, 811590), (27053, 777660), (29910, 703378), (31215, 673972), (38883, 541060), (41620, 505479), (51844, 405795), (54106, 388830), (59820, 351689), (62430, 336986), (64805, 324636), (77766, 270530), (81159, 259220), (108212, 194415), (124860, 168493), (129610, 162318), (135265, 155532)]