51211225

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1$

素因数の和:107

約数の個数: 72

約数和(自身を含む): 78423552

約数和(自身を除く): 27212327

約数列:

[1, 5, 13, 17, 23, 25, 31, 65, 85, 115, 155, 169, 221, 299, 325, 391, 403, 425, 527, 575, 713, 775, 845, 1105, 1495, 1955, 2015, 2635, 2873, 3565, 3887, 4225, 5083, 5239, 5525, 6851, 7475, 9269, 9775, 10075, 12121, 13175, 14365, 17825, 19435, 25415, 26195, 34255, 46345, 60605, 66079, 71825, 89063, 97175, 120497, 127075, 130975, 157573, 171275, 231725, 303025, 330395, 445315, 602485, 787865, 1651975, 2048449, 2226575, 3012425, 3939325, 10242245, 51211225]

約数ペア:

[(1, 51211225), (5, 10242245), (13, 3939325), (17, 3012425), (23, 2226575), (25, 2048449), (31, 1651975), (65, 787865), (85, 602485), (115, 445315), (155, 330395), (169, 303025), (221, 231725), (299, 171275), (325, 157573), (391, 130975), (403, 127075), (425, 120497), (527, 97175), (575, 89063), (713, 71825), (775, 66079), (845, 60605), (1105, 46345), (1495, 34255), (1955, 26195), (2015, 25415), (2635, 19435), (2873, 17825), (3565, 14365), (3887, 13175), (4225, 12121), (5083, 10075), (5239, 9775), (5525, 9269), (6851, 7475)]