21765940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1453}}^1$

素因数の和:1576

約数の個数: 48

約数和(自身を含む): 52762752

約数和(自身を除く): 30996812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 107, 140, 214, 428, 535, 749, 1070, 1453, 1498, 2140, 2906, 2996, 3745, 5812, 7265, 7490, 10171, 14530, 14980, 20342, 29060, 40684, 50855, 101710, 155471, 203420, 310942, 621884, 777355, 1088297, 1554710, 2176594, 3109420, 4353188, 5441485, 10882970, 21765940]

約数ペア:

[(1, 21765940), (2, 10882970), (4, 5441485), (5, 4353188), (7, 3109420), (10, 2176594), (14, 1554710), (20, 1088297), (28, 777355), (35, 621884), (70, 310942), (107, 203420), (140, 155471), (214, 101710), (428, 50855), (535, 40684), (749, 29060), (1070, 20342), (1453, 14980), (1498, 14530), (2140, 10171), (2906, 7490), (2996, 7265), (3745, 5812)]