20875420

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{241}}^1$

素因数の和:382

約数の個数: 48

約数和(自身を含む): 45372096

約数和(自身を除く): 24496676

約数列:

[1, 2, 4, 5, 10, 20, 61, 71, 122, 142, 241, 244, 284, 305, 355, 482, 610, 710, 964, 1205, 1220, 1420, 2410, 4331, 4820, 8662, 14701, 17111, 17324, 21655, 29402, 34222, 43310, 58804, 68444, 73505, 85555, 86620, 147010, 171110, 294020, 342220, 1043771, 2087542, 4175084, 5218855, 10437710, 20875420]

約数ペア:

[(1, 20875420), (2, 10437710), (4, 5218855), (5, 4175084), (10, 2087542), (20, 1043771), (61, 342220), (71, 294020), (122, 171110), (142, 147010), (241, 86620), (244, 85555), (284, 73505), (305, 68444), (355, 58804), (482, 43310), (610, 34222), (710, 29402), (964, 21655), (1205, 17324), (1220, 17111), (1420, 14701), (2410, 8662), (4331, 4820)]