20381725

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{31}}^1$

素因数の和:95

約数の個数: 72

約数和(自身を含む): 34108928

約数和(自身を除く): 13727203

約数列:

[1, 5, 7, 13, 17, 25, 31, 35, 65, 85, 91, 119, 155, 175, 217, 221, 289, 325, 403, 425, 455, 527, 595, 775, 1085, 1105, 1445, 1547, 2015, 2023, 2275, 2635, 2821, 2975, 3689, 3757, 5425, 5525, 6851, 7225, 7735, 8959, 10075, 10115, 13175, 14105, 18445, 18785, 26299, 34255, 38675, 44795, 47957, 50575, 62713, 70525, 92225, 93925, 116467, 131495, 171275, 223975, 239785, 313565, 582335, 657475, 815269, 1198925, 1567825, 2911675, 4076345, 20381725]

約数ペア:

[(1, 20381725), (5, 4076345), (7, 2911675), (13, 1567825), (17, 1198925), (25, 815269), (31, 657475), (35, 582335), (65, 313565), (85, 239785), (91, 223975), (119, 171275), (155, 131495), (175, 116467), (217, 93925), (221, 92225), (289, 70525), (325, 62713), (403, 50575), (425, 47957), (455, 44795), (527, 38675), (595, 34255), (775, 26299), (1085, 18785), (1105, 18445), (1445, 14105), (1547, 13175), (2015, 10115), (2023, 10075), (2275, 8959), (2635, 7735), (2821, 7225), (2975, 6851), (3689, 5525), (3757, 5425)]