64321280

素因数分解:

$2^8\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1673

約数の個数: 72

約数和(自身を含む): 159137664

約数和(自身を除く): 94816384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 256, 310, 320, 496, 620, 640, 992, 1240, 1280, 1621, 1984, 2480, 3242, 3968, 4960, 6484, 7936, 8105, 9920, 12968, 16210, 19840, 25936, 32420, 39680, 50251, 51872, 64840, 100502, 103744, 129680, 201004, 207488, 251255, 259360, 402008, 414976, 502510, 518720, 804016, 1005020, 1037440, 1608032, 2010040, 2074880, 3216064, 4020080, 6432128, 8040160, 12864256, 16080320, 32160640, 64321280]

約数ペア:

[(1, 64321280), (2, 32160640), (4, 16080320), (5, 12864256), (8, 8040160), (10, 6432128), (16, 4020080), (20, 3216064), (31, 2074880), (32, 2010040), (40, 1608032), (62, 1037440), (64, 1005020), (80, 804016), (124, 518720), (128, 502510), (155, 414976), (160, 402008), (248, 259360), (256, 251255), (310, 207488), (320, 201004), (496, 129680), (620, 103744), (640, 100502), (992, 64840), (1240, 51872), (1280, 50251), (1621, 39680), (1984, 32420), (2480, 25936), (3242, 19840), (3968, 16210), (4960, 12968), (6484, 9920), (7936, 8105)]