31405240

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^2\times {\mathrm{211}}^1$

素因数の和:344

約数の個数: 48

約数和(自身を含む): 72179640

約数和(自身を除く): 40774400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 211, 244, 305, 422, 488, 610, 844, 1055, 1220, 1688, 2110, 2440, 3721, 4220, 7442, 8440, 12871, 14884, 18605, 25742, 29768, 37210, 51484, 64355, 74420, 102968, 128710, 148840, 257420, 514840, 785131, 1570262, 3140524, 3925655, 6281048, 7851310, 15702620, 31405240]

約数ペア:

[(1, 31405240), (2, 15702620), (4, 7851310), (5, 6281048), (8, 3925655), (10, 3140524), (20, 1570262), (40, 785131), (61, 514840), (122, 257420), (211, 148840), (244, 128710), (305, 102968), (422, 74420), (488, 64355), (610, 51484), (844, 37210), (1055, 29768), (1220, 25742), (1688, 18605), (2110, 14884), (2440, 12871), (3721, 8440), (4220, 7442)]