648585

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:118

約数の個数: 48

約数和(自身を含む): 1347840

約数和(自身を除く): 699255

約数列:

[1, 3, 5, 7, 9, 15, 21, 29, 35, 45, 63, 71, 87, 105, 145, 203, 213, 261, 315, 355, 435, 497, 609, 639, 1015, 1065, 1305, 1491, 1827, 2059, 2485, 3045, 3195, 4473, 6177, 7455, 9135, 10295, 14413, 18531, 22365, 30885, 43239, 72065, 92655, 129717, 216195, 648585]

約数ペア:

[(1, 648585), (3, 216195), (5, 129717), (7, 92655), (9, 72065), (15, 43239), (21, 30885), (29, 22365), (35, 18531), (45, 14413), (63, 10295), (71, 9135), (87, 7455), (105, 6177), (145, 4473), (203, 3195), (213, 3045), (261, 2485), (315, 2059), (355, 1827), (435, 1491), (497, 1305), (609, 1065), (639, 1015)]