21535580

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^3\times {\mathrm{809}}^1$

素因数の和:851

約数の個数: 48

約数和(自身を含む): 49805280

約数和(自身を除く): 28269700

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 809, 1210, 1331, 1618, 2420, 2662, 3236, 4045, 5324, 6655, 8090, 8899, 13310, 16180, 17798, 26620, 35596, 44495, 88990, 97889, 177980, 195778, 391556, 489445, 978890, 1076779, 1957780, 2153558, 4307116, 5383895, 10767790, 21535580]

約数ペア:

[(1, 21535580), (2, 10767790), (4, 5383895), (5, 4307116), (10, 2153558), (11, 1957780), (20, 1076779), (22, 978890), (44, 489445), (55, 391556), (110, 195778), (121, 177980), (220, 97889), (242, 88990), (484, 44495), (605, 35596), (809, 26620), (1210, 17798), (1331, 16180), (1618, 13310), (2420, 8899), (2662, 8090), (3236, 6655), (4045, 5324)]