21597940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{11867}}^1$

素因数の和:11896

約数の個数: 48

約数和(自身を含む): 55827072

約数和(自身を除く): 34229132

約数列:

[1, 2, 4, 5, 7, 10, 13, 14, 20, 26, 28, 35, 52, 65, 70, 91, 130, 140, 182, 260, 364, 455, 910, 1820, 11867, 23734, 47468, 59335, 83069, 118670, 154271, 166138, 237340, 308542, 332276, 415345, 617084, 771355, 830690, 1079897, 1542710, 1661380, 2159794, 3085420, 4319588, 5399485, 10798970, 21597940]

約数ペア:

[(1, 21597940), (2, 10798970), (4, 5399485), (5, 4319588), (7, 3085420), (10, 2159794), (13, 1661380), (14, 1542710), (20, 1079897), (26, 830690), (28, 771355), (35, 617084), (52, 415345), (65, 332276), (70, 308542), (91, 237340), (130, 166138), (140, 154271), (182, 118670), (260, 83069), (364, 59335), (455, 47468), (910, 23734), (1820, 11867)]