18515025

素因数分解:

$3^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1$

素因数の和:167

約数の個数: 72

約数和(自身を含む): 35979840

約数和(自身を除く): 17464815

約数列:

[1, 3, 5, 9, 15, 19, 25, 45, 57, 61, 71, 75, 95, 171, 183, 213, 225, 285, 305, 355, 475, 549, 639, 855, 915, 1065, 1159, 1349, 1425, 1525, 1775, 2745, 3195, 3477, 4047, 4275, 4331, 4575, 5325, 5795, 6745, 10431, 12141, 12993, 13725, 15975, 17385, 20235, 21655, 28975, 33725, 38979, 52155, 60705, 64965, 82289, 86925, 101175, 108275, 194895, 246867, 260775, 303525, 324825, 411445, 740601, 974475, 1234335, 2057225, 3703005, 6171675, 18515025]

約数ペア:

[(1, 18515025), (3, 6171675), (5, 3703005), (9, 2057225), (15, 1234335), (19, 974475), (25, 740601), (45, 411445), (57, 324825), (61, 303525), (71, 260775), (75, 246867), (95, 194895), (171, 108275), (183, 101175), (213, 86925), (225, 82289), (285, 64965), (305, 60705), (355, 52155), (475, 38979), (549, 33725), (639, 28975), (855, 21655), (915, 20235), (1065, 17385), (1159, 15975), (1349, 13725), (1425, 12993), (1525, 12141), (1775, 10431), (2745, 6745), (3195, 5795), (3477, 5325), (4047, 4575), (4275, 4331)]