21515580

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{5197}}^1$

素因数の和:5235

約数の個数: 72

約数和(自身を含む): 68114592

約数和(自身を除く): 46599012

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 23, 30, 36, 45, 46, 60, 69, 90, 92, 115, 138, 180, 207, 230, 276, 345, 414, 460, 690, 828, 1035, 1380, 2070, 4140, 5197, 10394, 15591, 20788, 25985, 31182, 46773, 51970, 62364, 77955, 93546, 103940, 119531, 155910, 187092, 233865, 239062, 311820, 358593, 467730, 478124, 597655, 717186, 935460, 1075779, 1195310, 1434372, 1792965, 2151558, 2390620, 3585930, 4303116, 5378895, 7171860, 10757790, 21515580]

約数ペア:

[(1, 21515580), (2, 10757790), (3, 7171860), (4, 5378895), (5, 4303116), (6, 3585930), (9, 2390620), (10, 2151558), (12, 1792965), (15, 1434372), (18, 1195310), (20, 1075779), (23, 935460), (30, 717186), (36, 597655), (45, 478124), (46, 467730), (60, 358593), (69, 311820), (90, 239062), (92, 233865), (115, 187092), (138, 155910), (180, 119531), (207, 103940), (230, 93546), (276, 77955), (345, 62364), (414, 51970), (460, 46773), (690, 31182), (828, 25985), (1035, 20788), (1380, 15591), (2070, 10394), (4140, 5197)]