21382180

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^2\times {\mathrm{43}}^1\times {\mathrm{47}}^1$

素因数の和:145

約数の個数: 72

約数和(自身を含む): 49053312

約数和(自身を除く): 27671132

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 47, 86, 92, 94, 115, 172, 188, 215, 230, 235, 430, 460, 470, 529, 860, 940, 989, 1058, 1081, 1978, 2021, 2116, 2162, 2645, 3956, 4042, 4324, 4945, 5290, 5405, 8084, 9890, 10105, 10580, 10810, 19780, 20210, 21620, 22747, 24863, 40420, 45494, 46483, 49726, 90988, 92966, 99452, 113735, 124315, 185932, 227470, 232415, 248630, 454940, 464830, 497260, 929660, 1069109, 2138218, 4276436, 5345545, 10691090, 21382180]

約数ペア:

[(1, 21382180), (2, 10691090), (4, 5345545), (5, 4276436), (10, 2138218), (20, 1069109), (23, 929660), (43, 497260), (46, 464830), (47, 454940), (86, 248630), (92, 232415), (94, 227470), (115, 185932), (172, 124315), (188, 113735), (215, 99452), (230, 92966), (235, 90988), (430, 49726), (460, 46483), (470, 45494), (529, 40420), (860, 24863), (940, 22747), (989, 21620), (1058, 20210), (1081, 19780), (1978, 10810), (2021, 10580), (2116, 10105), (2162, 9890), (2645, 8084), (3956, 5405), (4042, 5290), (4324, 4945)]