81859980

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{71807}}^1$

素因数の和:71838

約数の個数: 48

約数和(自身を含む): 241274880

約数和(自身を除く): 159414900

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 19, 20, 30, 38, 57, 60, 76, 95, 114, 190, 228, 285, 380, 570, 1140, 71807, 143614, 215421, 287228, 359035, 430842, 718070, 861684, 1077105, 1364333, 1436140, 2154210, 2728666, 4092999, 4308420, 5457332, 6821665, 8185998, 13643330, 16371996, 20464995, 27286660, 40929990, 81859980]

約数ペア:

[(1, 81859980), (2, 40929990), (3, 27286660), (4, 20464995), (5, 16371996), (6, 13643330), (10, 8185998), (12, 6821665), (15, 5457332), (19, 4308420), (20, 4092999), (30, 2728666), (38, 2154210), (57, 1436140), (60, 1364333), (76, 1077105), (95, 861684), (114, 718070), (190, 430842), (228, 359035), (285, 287228), (380, 215421), (570, 143614), (1140, 71807)]