20400380

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{1019}}^1$

素因数の和:1059

約数の個数: 96

約数和(自身を含む): 57576960

約数和(自身を除く): 37176580

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 26, 28, 35, 44, 52, 55, 65, 70, 77, 91, 110, 130, 140, 143, 154, 182, 220, 260, 286, 308, 364, 385, 455, 572, 715, 770, 910, 1001, 1019, 1430, 1540, 1820, 2002, 2038, 2860, 4004, 4076, 5005, 5095, 7133, 10010, 10190, 11209, 13247, 14266, 20020, 20380, 22418, 26494, 28532, 35665, 44836, 52988, 56045, 66235, 71330, 78463, 92729, 112090, 132470, 142660, 145717, 156926, 185458, 224180, 264940, 291434, 313852, 370916, 392315, 463645, 582868, 728585, 784630, 927290, 1020019, 1457170, 1569260, 1854580, 2040038, 2914340, 4080076, 5100095, 10200190, 20400380]

約数ペア:

[(1, 20400380), (2, 10200190), (4, 5100095), (5, 4080076), (7, 2914340), (10, 2040038), (11, 1854580), (13, 1569260), (14, 1457170), (20, 1020019), (22, 927290), (26, 784630), (28, 728585), (35, 582868), (44, 463645), (52, 392315), (55, 370916), (65, 313852), (70, 291434), (77, 264940), (91, 224180), (110, 185458), (130, 156926), (140, 145717), (143, 142660), (154, 132470), (182, 112090), (220, 92729), (260, 78463), (286, 71330), (308, 66235), (364, 56045), (385, 52988), (455, 44836), (572, 35665), (715, 28532), (770, 26494), (910, 22418), (1001, 20380), (1019, 20020), (1430, 14266), (1540, 13247), (1820, 11209), (2002, 10190), (2038, 10010), (2860, 7133), (4004, 5095), (4076, 5005)]