25519975

素因数分解:

$5^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 37497600

約数和(自身を除く): 11977625

約数列:

[1, 5, 13, 17, 25, 31, 65, 85, 149, 155, 221, 325, 403, 425, 527, 745, 775, 1105, 1937, 2015, 2533, 2635, 3725, 4619, 5525, 6851, 9685, 10075, 12665, 13175, 23095, 32929, 34255, 48425, 60047, 63325, 78523, 115475, 164645, 171275, 300235, 392615, 823225, 1020799, 1501175, 1963075, 5103995, 25519975]

約数ペア:

[(1, 25519975), (5, 5103995), (13, 1963075), (17, 1501175), (25, 1020799), (31, 823225), (65, 392615), (85, 300235), (149, 171275), (155, 164645), (221, 115475), (325, 78523), (403, 63325), (425, 60047), (527, 48425), (745, 34255), (775, 32929), (1105, 23095), (1937, 13175), (2015, 12665), (2533, 10075), (2635, 9685), (3725, 6851), (4619, 5525)]