31000775

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:252

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 14496313

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 155, 181, 221, 325, 403, 425, 527, 775, 905, 1105, 2015, 2353, 2635, 3077, 4525, 5525, 5611, 6851, 10075, 11765, 13175, 15385, 28055, 34255, 40001, 58825, 72943, 76925, 95387, 140275, 171275, 200005, 364715, 476935, 1000025, 1240031, 1823575, 2384675, 6200155, 31000775]

約数ペア:

[(1, 31000775), (5, 6200155), (13, 2384675), (17, 1823575), (25, 1240031), (31, 1000025), (65, 476935), (85, 364715), (155, 200005), (181, 171275), (221, 140275), (325, 95387), (403, 76925), (425, 72943), (527, 58825), (775, 40001), (905, 34255), (1105, 28055), (2015, 15385), (2353, 13175), (2635, 11765), (3077, 10075), (4525, 6851), (5525, 5611)]