20967828

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{47}}^2\times {\mathrm{113}}^1$

素因数の和:221

約数の個数: 72

約数和(自身を含む): 57634752

約数和(自身を除く): 36666924

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 47, 84, 94, 113, 141, 188, 226, 282, 329, 339, 452, 564, 658, 678, 791, 987, 1316, 1356, 1582, 1974, 2209, 2373, 3164, 3948, 4418, 4746, 5311, 6627, 8836, 9492, 10622, 13254, 15463, 15933, 21244, 26508, 30926, 31866, 37177, 46389, 61852, 63732, 74354, 92778, 111531, 148708, 185556, 223062, 249617, 446124, 499234, 748851, 998468, 1497702, 1747319, 2995404, 3494638, 5241957, 6989276, 10483914, 20967828]

約数ペア:

[(1, 20967828), (2, 10483914), (3, 6989276), (4, 5241957), (6, 3494638), (7, 2995404), (12, 1747319), (14, 1497702), (21, 998468), (28, 748851), (42, 499234), (47, 446124), (84, 249617), (94, 223062), (113, 185556), (141, 148708), (188, 111531), (226, 92778), (282, 74354), (329, 63732), (339, 61852), (452, 46389), (564, 37177), (658, 31866), (678, 30926), (791, 26508), (987, 21244), (1316, 15933), (1356, 15463), (1582, 13254), (1974, 10622), (2209, 9492), (2373, 8836), (3164, 6627), (3948, 5311), (4418, 4746)]