81921220

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{1861}}^1$

素因数の和:1972

約数の個数: 48

約数和(自身を含む): 180182016

約数和(自身を除く): 98260796

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 71, 124, 142, 155, 284, 310, 355, 620, 710, 1420, 1861, 2201, 3722, 4402, 7444, 8804, 9305, 11005, 18610, 22010, 37220, 44020, 57691, 115382, 132131, 230764, 264262, 288455, 528524, 576910, 660655, 1153820, 1321310, 2642620, 4096061, 8192122, 16384244, 20480305, 40960610, 81921220]

約数ペア:

[(1, 81921220), (2, 40960610), (4, 20480305), (5, 16384244), (10, 8192122), (20, 4096061), (31, 2642620), (62, 1321310), (71, 1153820), (124, 660655), (142, 576910), (155, 528524), (284, 288455), (310, 264262), (355, 230764), (620, 132131), (710, 115382), (1420, 57691), (1861, 44020), (2201, 37220), (3722, 22010), (4402, 18610), (7444, 11005), (8804, 9305)]