128481880

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{191}}^1\times {\mathrm{251}}^1$

素因数の和:520

約数の個数: 64

約数和(自身を含む): 296110080

約数和(自身を除く): 167628200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 191, 251, 268, 335, 382, 502, 536, 670, 764, 955, 1004, 1255, 1340, 1528, 1910, 2008, 2510, 2680, 3820, 5020, 7640, 10040, 12797, 16817, 25594, 33634, 47941, 51188, 63985, 67268, 84085, 95882, 102376, 127970, 134536, 168170, 191764, 239705, 255940, 336340, 383528, 479410, 511880, 672680, 958820, 1917640, 3212047, 6424094, 12848188, 16060235, 25696376, 32120470, 64240940, 128481880]

約数ペア:

[(1, 128481880), (2, 64240940), (4, 32120470), (5, 25696376), (8, 16060235), (10, 12848188), (20, 6424094), (40, 3212047), (67, 1917640), (134, 958820), (191, 672680), (251, 511880), (268, 479410), (335, 383528), (382, 336340), (502, 255940), (536, 239705), (670, 191764), (764, 168170), (955, 134536), (1004, 127970), (1255, 102376), (1340, 95882), (1528, 84085), (1910, 67268), (2008, 63985), (2510, 51188), (2680, 47941), (3820, 33634), (5020, 25594), (7640, 16817), (10040, 12797)]