81481725

素因数分解:

$3^2\times 5^2\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{313}}^1$

素因数の和:431

約数の個数: 72

約数和(自身を含む): 159442920

約数和(自身を除く): 77961195

約数列:

[1, 3, 5, 9, 13, 15, 25, 39, 45, 65, 75, 89, 117, 195, 225, 267, 313, 325, 445, 585, 801, 939, 975, 1157, 1335, 1565, 2225, 2817, 2925, 3471, 4005, 4069, 4695, 5785, 6675, 7825, 10413, 12207, 14085, 17355, 20025, 20345, 23475, 27857, 28925, 36621, 52065, 61035, 70425, 83571, 86775, 101725, 139285, 183105, 250713, 260325, 305175, 362141, 417855, 696425, 915525, 1086423, 1253565, 1810705, 2089275, 3259269, 5432115, 6267825, 9053525, 16296345, 27160575, 81481725]

約数ペア:

[(1, 81481725), (3, 27160575), (5, 16296345), (9, 9053525), (13, 6267825), (15, 5432115), (25, 3259269), (39, 2089275), (45, 1810705), (65, 1253565), (75, 1086423), (89, 915525), (117, 696425), (195, 417855), (225, 362141), (267, 305175), (313, 260325), (325, 250713), (445, 183105), (585, 139285), (801, 101725), (939, 86775), (975, 83571), (1157, 70425), (1335, 61035), (1565, 52065), (2225, 36621), (2817, 28925), (2925, 27857), (3471, 23475), (4005, 20345), (4069, 20025), (4695, 17355), (5785, 14085), (6675, 12207), (7825, 10413)]