20121852980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{271}}^1\times {\mathrm{52289}}^1$

素因数の和:52640

約数の個数: 48

約数和(自身を含む): 43009989120

約数和(自身を除く): 22888136140

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 271, 284, 355, 542, 710, 1084, 1355, 1420, 2710, 5420, 19241, 38482, 52289, 76964, 96205, 104578, 192410, 209156, 261445, 384820, 522890, 1045780, 3712519, 7425038, 14170319, 14850076, 18562595, 28340638, 37125190, 56681276, 70851595, 74250380, 141703190, 283406380, 1006092649, 2012185298, 4024370596, 5030463245, 10060926490, 20121852980]

約数ペア:

[(1, 20121852980), (2, 10060926490), (4, 5030463245), (5, 4024370596), (10, 2012185298), (20, 1006092649), (71, 283406380), (142, 141703190), (271, 74250380), (284, 70851595), (355, 56681276), (542, 37125190), (710, 28340638), (1084, 18562595), (1355, 14850076), (1420, 14170319), (2710, 7425038), (5420, 3712519), (19241, 1045780), (38482, 522890), (52289, 384820), (76964, 261445), (96205, 209156), (104578, 192410)]