28639940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1303}}^1$

素因数の和:1476

約数の個数: 48

約数和(自身を含む): 69226752

約数和(自身を除く): 40586812

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 1099, 1303, 1570, 2198, 2606, 3140, 4396, 5212, 5495, 6515, 9121, 10990, 13030, 18242, 21980, 26060, 36484, 45605, 91210, 182420, 204571, 409142, 818284, 1022855, 1431997, 2045710, 2863994, 4091420, 5727988, 7159985, 14319970, 28639940]

約数ペア:

[(1, 28639940), (2, 14319970), (4, 7159985), (5, 5727988), (7, 4091420), (10, 2863994), (14, 2045710), (20, 1431997), (28, 1022855), (35, 818284), (70, 409142), (140, 204571), (157, 182420), (314, 91210), (628, 45605), (785, 36484), (1099, 26060), (1303, 21980), (1570, 18242), (2198, 13030), (2606, 10990), (3140, 9121), (4396, 6515), (5212, 5495)]