18972993

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:273

約数の個数: 32

約数和(自身を含む): 28377216

約数和(自身を除く): 9404223

約数列:

[1, 3, 13, 39, 53, 67, 137, 159, 201, 411, 689, 871, 1781, 2067, 2613, 3551, 5343, 7261, 9179, 10653, 21783, 27537, 46163, 94393, 119327, 138489, 283179, 357981, 486487, 1459461, 6324331, 18972993]

約数ペア:

[(1, 18972993), (3, 6324331), (13, 1459461), (39, 486487), (53, 357981), (67, 283179), (137, 138489), (159, 119327), (201, 94393), (411, 46163), (689, 27537), (871, 21783), (1781, 10653), (2067, 9179), (2613, 7261), (3551, 5343)]