21125867880

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{643}}^1\times {\mathrm{21061}}^1$

素因数の和:21731

約数の個数: 128

約数和(自身を含む): 68362197120

約数和(自身を除く): 47236329240

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 120, 130, 156, 195, 260, 312, 390, 520, 643, 780, 1286, 1560, 1929, 2572, 3215, 3858, 5144, 6430, 7716, 8359, 9645, 12860, 15432, 16718, 19290, 21061, 25077, 25720, 33436, 38580, 41795, 42122, 50154, 63183, 66872, 77160, 83590, 84244, 100308, 105305, 125385, 126366, 167180, 168488, 200616, 210610, 250770, 252732, 273793, 315915, 334360, 421220, 501540, 505464, 547586, 631830, 821379, 842440, 1003080, 1095172, 1263660, 1368965, 1642758, 2190344, 2527320, 2737930, 3285516, 4106895, 5475860, 6571032, 8213790, 10951720, 13542223, 16427580, 27084446, 32855160, 40626669, 54168892, 67711115, 81253338, 108337784, 135422230, 162506676, 176048899, 203133345, 270844460, 325013352, 352097798, 406266690, 528146697, 541688920, 704195596, 812533380, 880244495, 1056293394, 1408391192, 1625066760, 1760488990, 2112586788, 2640733485, 3520977980, 4225173576, 5281466970, 7041955960, 10562933940, 21125867880]

約数ペア:

[(1, 21125867880), (2, 10562933940), (3, 7041955960), (4, 5281466970), (5, 4225173576), (6, 3520977980), (8, 2640733485), (10, 2112586788), (12, 1760488990), (13, 1625066760), (15, 1408391192), (20, 1056293394), (24, 880244495), (26, 812533380), (30, 704195596), (39, 541688920), (40, 528146697), (52, 406266690), (60, 352097798), (65, 325013352), (78, 270844460), (104, 203133345), (120, 176048899), (130, 162506676), (156, 135422230), (195, 108337784), (260, 81253338), (312, 67711115), (390, 54168892), (520, 40626669), (643, 32855160), (780, 27084446), (1286, 16427580), (1560, 13542223), (1929, 10951720), (2572, 8213790), (3215, 6571032), (3858, 5475860), (5144, 4106895), (6430, 3285516), (7716, 2737930), (8359, 2527320), (9645, 2190344), (12860, 1642758), (15432, 1368965), (16718, 1263660), (19290, 1095172), (21061, 1003080), (25077, 842440), (25720, 821379), (33436, 631830), (38580, 547586), (41795, 505464), (42122, 501540), (50154, 421220), (63183, 334360), (66872, 315915), (77160, 273793), (83590, 252732), (84244, 250770), (100308, 210610), (105305, 200616), (125385, 168488), (126366, 167180)]