18303320

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{131}}^1\times {\mathrm{499}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 47520000

約数和(自身を除く): 29216680

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 131, 140, 262, 280, 499, 524, 655, 917, 998, 1048, 1310, 1834, 1996, 2495, 2620, 3493, 3668, 3992, 4585, 4990, 5240, 6986, 7336, 9170, 9980, 13972, 17465, 18340, 19960, 27944, 34930, 36680, 65369, 69860, 130738, 139720, 261476, 326845, 457583, 522952, 653690, 915166, 1307380, 1830332, 2287915, 2614760, 3660664, 4575830, 9151660, 18303320]

約数ペア:

[(1, 18303320), (2, 9151660), (4, 4575830), (5, 3660664), (7, 2614760), (8, 2287915), (10, 1830332), (14, 1307380), (20, 915166), (28, 653690), (35, 522952), (40, 457583), (56, 326845), (70, 261476), (131, 139720), (140, 130738), (262, 69860), (280, 65369), (499, 36680), (524, 34930), (655, 27944), (917, 19960), (998, 18340), (1048, 17465), (1310, 13972), (1834, 9980), (1996, 9170), (2495, 7336), (2620, 6986), (3493, 5240), (3668, 4990), (3992, 4585)]