279457775

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{89}}^1$

素因数の和:260

約数の個数: 48

約数和(自身を含む): 373636800

約数和(自身を除く): 94179025

約数列:

[1, 5, 25, 29, 61, 71, 89, 145, 305, 355, 445, 725, 1525, 1769, 1775, 2059, 2225, 2581, 4331, 5429, 6319, 8845, 10295, 12905, 21655, 27145, 31595, 44225, 51475, 64525, 108275, 125599, 135725, 157441, 157975, 183251, 385459, 627995, 787205, 916255, 1927295, 3139975, 3936025, 4581275, 9636475, 11178311, 55891555, 279457775]

約数ペア:

[(1, 279457775), (5, 55891555), (25, 11178311), (29, 9636475), (61, 4581275), (71, 3936025), (89, 3139975), (145, 1927295), (305, 916255), (355, 787205), (445, 627995), (725, 385459), (1525, 183251), (1769, 157975), (1775, 157441), (2059, 135725), (2225, 125599), (2581, 108275), (4331, 64525), (5429, 51475), (6319, 44225), (8845, 31595), (10295, 27145), (12905, 21655)]