20181975

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{1439}}^1$

素因数の和:1480

約数の個数: 48

約数和(自身を含む): 38568960

約数和(自身を除く): 18386985

約数列:

[1, 3, 5, 11, 15, 17, 25, 33, 51, 55, 75, 85, 165, 187, 255, 275, 425, 561, 825, 935, 1275, 1439, 2805, 4317, 4675, 7195, 14025, 15829, 21585, 24463, 35975, 47487, 73389, 79145, 107925, 122315, 237435, 269093, 366945, 395725, 611575, 807279, 1187175, 1345465, 1834725, 4036395, 6727325, 20181975]

約数ペア:

[(1, 20181975), (3, 6727325), (5, 4036395), (11, 1834725), (15, 1345465), (17, 1187175), (25, 807279), (33, 611575), (51, 395725), (55, 366945), (75, 269093), (85, 237435), (165, 122315), (187, 107925), (255, 79145), (275, 73389), (425, 47487), (561, 35975), (825, 24463), (935, 21585), (1275, 15829), (1439, 14025), (2805, 7195), (4317, 4675)]