128642560

素因数分解:

$2^9\times 5^1\times {\mathrm{31}}^1\times {\mathrm{1621}}^1$

素因数の和:1675

約数の個数: 80

約数和(自身を含む): 318586752

約数和(自身を除く): 189944192

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, 512, 620, 640, 992, 1240, 1280, 1621, 1984, 2480, 2560, 3242, 3968, 4960, 6484, 7936, 8105, 9920, 12968, 15872, 16210, 19840, 25936, 32420, 39680, 50251, 51872, 64840, 79360, 100502, 103744, 129680, 201004, 207488, 251255, 259360, 402008, 414976, 502510, 518720, 804016, 829952, 1005020, 1037440, 1608032, 2010040, 2074880, 3216064, 4020080, 4149760, 6432128, 8040160, 12864256, 16080320, 25728512, 32160640, 64321280, 128642560]

約数ペア:

[(1, 128642560), (2, 64321280), (4, 32160640), (5, 25728512), (8, 16080320), (10, 12864256), (16, 8040160), (20, 6432128), (31, 4149760), (32, 4020080), (40, 3216064), (62, 2074880), (64, 2010040), (80, 1608032), (124, 1037440), (128, 1005020), (155, 829952), (160, 804016), (248, 518720), (256, 502510), (310, 414976), (320, 402008), (496, 259360), (512, 251255), (620, 207488), (640, 201004), (992, 129680), (1240, 103744), (1280, 100502), (1621, 79360), (1984, 64840), (2480, 51872), (2560, 50251), (3242, 39680), (3968, 32420), (4960, 25936), (6484, 19840), (7936, 16210), (8105, 15872), (9920, 12968)]