20847440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15329}}^1$

素因数の和:15359

約数の個数: 40

約数和(自身を含む): 51324840

約数和(自身を除く): 30477400

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15329, 30658, 61316, 76645, 122632, 153290, 245264, 260593, 306580, 521186, 613160, 1042372, 1226320, 1302965, 2084744, 2605930, 4169488, 5211860, 10423720, 20847440]

約数ペア:

[(1, 20847440), (2, 10423720), (4, 5211860), (5, 4169488), (8, 2605930), (10, 2084744), (16, 1302965), (17, 1226320), (20, 1042372), (34, 613160), (40, 521186), (68, 306580), (80, 260593), (85, 245264), (136, 153290), (170, 122632), (272, 76645), (340, 61316), (680, 30658), (1360, 15329)]