21305830

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{1801}}^1$

素因数の和:1841

約数の個数: 48

約数和(自身を含む): 47486304

約数和(自身を除く): 26180474

約数列:

[1, 2, 5, 7, 10, 13, 14, 26, 35, 65, 70, 91, 130, 169, 182, 338, 455, 845, 910, 1183, 1690, 1801, 2366, 3602, 5915, 9005, 11830, 12607, 18010, 23413, 25214, 46826, 63035, 117065, 126070, 163891, 234130, 304369, 327782, 608738, 819455, 1521845, 1638910, 2130583, 3043690, 4261166, 10652915, 21305830]

約数ペア:

[(1, 21305830), (2, 10652915), (5, 4261166), (7, 3043690), (10, 2130583), (13, 1638910), (14, 1521845), (26, 819455), (35, 608738), (65, 327782), (70, 304369), (91, 234130), (130, 163891), (169, 126070), (182, 117065), (338, 63035), (455, 46826), (845, 25214), (910, 23413), (1183, 18010), (1690, 12607), (1801, 11830), (2366, 9005), (3602, 5915)]