21260484

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{239}}^1\times {\mathrm{353}}^1$

素因数の和:609

約数の個数: 72

約数和(自身を含む): 61850880

約数和(自身を除く): 40590396

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 239, 252, 353, 478, 706, 717, 956, 1059, 1412, 1434, 1673, 2118, 2151, 2471, 2868, 3177, 3346, 4236, 4302, 4942, 5019, 6354, 6692, 7413, 8604, 9884, 10038, 12708, 14826, 15057, 20076, 22239, 29652, 30114, 44478, 60228, 84367, 88956, 168734, 253101, 337468, 506202, 590569, 759303, 1012404, 1181138, 1518606, 1771707, 2362276, 3037212, 3543414, 5315121, 7086828, 10630242, 21260484]

約数ペア:

[(1, 21260484), (2, 10630242), (3, 7086828), (4, 5315121), (6, 3543414), (7, 3037212), (9, 2362276), (12, 1771707), (14, 1518606), (18, 1181138), (21, 1012404), (28, 759303), (36, 590569), (42, 506202), (63, 337468), (84, 253101), (126, 168734), (239, 88956), (252, 84367), (353, 60228), (478, 44478), (706, 30114), (717, 29652), (956, 22239), (1059, 20076), (1412, 15057), (1434, 14826), (1673, 12708), (2118, 10038), (2151, 9884), (2471, 8604), (2868, 7413), (3177, 6692), (3346, 6354), (4236, 5019), (4302, 4942)]