291681325

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{131}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 431329536

約数和(自身を除く): 139648211

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 131, 155, 169, 221, 325, 403, 425, 527, 655, 775, 845, 1105, 1703, 2015, 2227, 2635, 2873, 3275, 4061, 4225, 5239, 5525, 6851, 8515, 10075, 11135, 13175, 14365, 20305, 22139, 26195, 28951, 34255, 42575, 52793, 55675, 69037, 71825, 89063, 101525, 110695, 130975, 144755, 171275, 263965, 345185, 376363, 445315, 553475, 686309, 723775, 897481, 1319825, 1725925, 1881815, 2226575, 3431545, 4487405, 9409075, 11667253, 17157725, 22437025, 58336265, 291681325]

約数ペア:

[(1, 291681325), (5, 58336265), (13, 22437025), (17, 17157725), (25, 11667253), (31, 9409075), (65, 4487405), (85, 3431545), (131, 2226575), (155, 1881815), (169, 1725925), (221, 1319825), (325, 897481), (403, 723775), (425, 686309), (527, 553475), (655, 445315), (775, 376363), (845, 345185), (1105, 263965), (1703, 171275), (2015, 144755), (2227, 130975), (2635, 110695), (2873, 101525), (3275, 89063), (4061, 71825), (4225, 69037), (5239, 55675), (5525, 52793), (6851, 42575), (8515, 34255), (10075, 28951), (11135, 26195), (13175, 22139), (14365, 20305)]