21215587390

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{181}}^1\times {\mathrm{165089}}^1$

素因数の和:165348

約数の個数: 32

約数和(自身を含む): 38940108480

約数和(自身を除く): 17724521090

約数列:

[1, 2, 5, 10, 71, 142, 181, 355, 362, 710, 905, 1810, 12851, 25702, 64255, 128510, 165089, 330178, 825445, 1650890, 11721319, 23442638, 29881109, 58606595, 59762218, 117213190, 149405545, 298811090, 2121558739, 4243117478, 10607793695, 21215587390]

約数ペア:

[(1, 21215587390), (2, 10607793695), (5, 4243117478), (10, 2121558739), (71, 298811090), (142, 149405545), (181, 117213190), (355, 59762218), (362, 58606595), (710, 29881109), (905, 23442638), (1810, 11721319), (12851, 1650890), (25702, 825445), (64255, 330178), (128510, 165089)]