21408940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{4133}}^1$

素因数の和:4186

約数の個数: 48

約数和(自身を含む): 52782912

約数和(自身を除く): 31373972

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 70, 74, 140, 148, 185, 259, 370, 518, 740, 1036, 1295, 2590, 4133, 5180, 8266, 16532, 20665, 28931, 41330, 57862, 82660, 115724, 144655, 152921, 289310, 305842, 578620, 611684, 764605, 1070447, 1529210, 2140894, 3058420, 4281788, 5352235, 10704470, 21408940]

約数ペア:

[(1, 21408940), (2, 10704470), (4, 5352235), (5, 4281788), (7, 3058420), (10, 2140894), (14, 1529210), (20, 1070447), (28, 764605), (35, 611684), (37, 578620), (70, 305842), (74, 289310), (140, 152921), (148, 144655), (185, 115724), (259, 82660), (370, 57862), (518, 41330), (740, 28931), (1036, 20665), (1295, 16532), (2590, 8266), (4133, 5180)]