21150880

素因数分解:

$2^5\times 5^1\times {\mathrm{163}}^1\times {\mathrm{811}}^1$

素因数の和:989

約数の個数: 48

約数和(自身を含む): 50337504

約数和(自身を除く): 29186624

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 163, 326, 652, 811, 815, 1304, 1622, 1630, 2608, 3244, 3260, 4055, 5216, 6488, 6520, 8110, 12976, 13040, 16220, 25952, 26080, 32440, 64880, 129760, 132193, 264386, 528772, 660965, 1057544, 1321930, 2115088, 2643860, 4230176, 5287720, 10575440, 21150880]

約数ペア:

[(1, 21150880), (2, 10575440), (4, 5287720), (5, 4230176), (8, 2643860), (10, 2115088), (16, 1321930), (20, 1057544), (32, 660965), (40, 528772), (80, 264386), (160, 132193), (163, 129760), (326, 64880), (652, 32440), (811, 26080), (815, 25952), (1304, 16220), (1622, 13040), (1630, 12976), (2608, 8110), (3244, 6520), (3260, 6488), (4055, 5216)]