1621802975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1\times {\mathrm{557}}^1$

素因数の和:645

約数の個数: 72

約数和(自身を含む): 2379097728

約数和(自身を除く): 757294753

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 155, 221, 289, 325, 403, 425, 527, 557, 775, 1105, 1445, 2015, 2635, 2785, 3757, 5525, 6851, 7225, 7241, 8959, 9469, 10075, 13175, 13925, 17267, 18785, 34255, 36205, 44795, 47345, 86335, 93925, 116467, 123097, 160973, 171275, 181025, 223975, 224471, 236725, 293539, 431675, 582335, 615485, 804865, 1122355, 1467695, 2092649, 2911675, 3077425, 3816007, 4024325, 4990163, 5611775, 7338475, 10463245, 19080035, 24950815, 52316225, 64872119, 95400175, 124754075, 324360595, 1621802975]

約数ペア:

[(1, 1621802975), (5, 324360595), (13, 124754075), (17, 95400175), (25, 64872119), (31, 52316225), (65, 24950815), (85, 19080035), (155, 10463245), (221, 7338475), (289, 5611775), (325, 4990163), (403, 4024325), (425, 3816007), (527, 3077425), (557, 2911675), (775, 2092649), (1105, 1467695), (1445, 1122355), (2015, 804865), (2635, 615485), (2785, 582335), (3757, 431675), (5525, 293539), (6851, 236725), (7225, 224471), (7241, 223975), (8959, 181025), (9469, 171275), (10075, 160973), (13175, 123097), (13925, 116467), (17267, 93925), (18785, 86335), (34255, 47345), (36205, 44795)]