25229440

素因数分解:

$2^7\times 5^1\times {\mathrm{79}}^1\times {\mathrm{499}}^1$

素因数の和:597

約数の個数: 64

約数和(自身を含む): 61200000

約数和(自身を除く): 35970560

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 79, 80, 128, 158, 160, 316, 320, 395, 499, 632, 640, 790, 998, 1264, 1580, 1996, 2495, 2528, 3160, 3992, 4990, 5056, 6320, 7984, 9980, 10112, 12640, 15968, 19960, 25280, 31936, 39421, 39920, 50560, 63872, 78842, 79840, 157684, 159680, 197105, 315368, 319360, 394210, 630736, 788420, 1261472, 1576840, 2522944, 3153680, 5045888, 6307360, 12614720, 25229440]

約数ペア:

[(1, 25229440), (2, 12614720), (4, 6307360), (5, 5045888), (8, 3153680), (10, 2522944), (16, 1576840), (20, 1261472), (32, 788420), (40, 630736), (64, 394210), (79, 319360), (80, 315368), (128, 197105), (158, 159680), (160, 157684), (316, 79840), (320, 78842), (395, 63872), (499, 50560), (632, 39920), (640, 39421), (790, 31936), (998, 25280), (1264, 19960), (1580, 15968), (1996, 12640), (2495, 10112), (2528, 9980), (3160, 7984), (3992, 6320), (4990, 5056)]