2685220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:172

約数の個数: 48

約数和(自身を含む): 5999616

約数和(自身を除く): 3314396

約数列:

[1, 2, 4, 5, 10, 20, 31, 61, 62, 71, 122, 124, 142, 155, 244, 284, 305, 310, 355, 610, 620, 710, 1220, 1420, 1891, 2201, 3782, 4331, 4402, 7564, 8662, 8804, 9455, 11005, 17324, 18910, 21655, 22010, 37820, 43310, 44020, 86620, 134261, 268522, 537044, 671305, 1342610, 2685220]

約数ペア:

[(1, 2685220), (2, 1342610), (4, 671305), (5, 537044), (10, 268522), (20, 134261), (31, 86620), (61, 44020), (62, 43310), (71, 37820), (122, 22010), (124, 21655), (142, 18910), (155, 17324), (244, 11005), (284, 9455), (305, 8804), (310, 8662), (355, 7564), (610, 4402), (620, 4331), (710, 3782), (1220, 2201), (1420, 1891)]