20765925

素因数分解:

$3^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1$

素因数の和:183

約数の個数: 72

約数和(自身を含む): 40477320

約数和(自身を除く): 19711395

約数列:

[1, 3, 5, 9, 15, 17, 25, 45, 51, 61, 75, 85, 89, 153, 183, 225, 255, 267, 305, 425, 445, 549, 765, 801, 915, 1037, 1275, 1335, 1513, 1525, 2225, 2745, 3111, 3825, 4005, 4539, 4575, 5185, 5429, 6675, 7565, 9333, 13617, 13725, 15555, 16287, 20025, 22695, 25925, 27145, 37825, 46665, 48861, 68085, 77775, 81435, 92293, 113475, 135725, 233325, 244305, 276879, 340425, 407175, 461465, 830637, 1221525, 1384395, 2307325, 4153185, 6921975, 20765925]

約数ペア:

[(1, 20765925), (3, 6921975), (5, 4153185), (9, 2307325), (15, 1384395), (17, 1221525), (25, 830637), (45, 461465), (51, 407175), (61, 340425), (75, 276879), (85, 244305), (89, 233325), (153, 135725), (183, 113475), (225, 92293), (255, 81435), (267, 77775), (305, 68085), (425, 48861), (445, 46665), (549, 37825), (765, 27145), (801, 25925), (915, 22695), (1037, 20025), (1275, 16287), (1335, 15555), (1513, 13725), (1525, 13617), (2225, 9333), (2745, 7565), (3111, 6675), (3825, 5429), (4005, 5185), (4539, 4575)]