20891925

素因数分解:

$3^5\times 5^2\times {\mathrm{19}}^1\times {\mathrm{181}}^1$

素因数の和:225

約数の個数: 72

約数和(自身を含む): 41073760

約数和(自身を除く): 20181835

約数列:

[1, 3, 5, 9, 15, 19, 25, 27, 45, 57, 75, 81, 95, 135, 171, 181, 225, 243, 285, 405, 475, 513, 543, 675, 855, 905, 1215, 1425, 1539, 1629, 2025, 2565, 2715, 3439, 4275, 4525, 4617, 4887, 6075, 7695, 8145, 10317, 12825, 13575, 14661, 17195, 23085, 24435, 30951, 38475, 40725, 43983, 51585, 73305, 85975, 92853, 115425, 122175, 154755, 219915, 257925, 278559, 366525, 464265, 773775, 835677, 1099575, 1392795, 2321325, 4178385, 6963975, 20891925]

約数ペア:

[(1, 20891925), (3, 6963975), (5, 4178385), (9, 2321325), (15, 1392795), (19, 1099575), (25, 835677), (27, 773775), (45, 464265), (57, 366525), (75, 278559), (81, 257925), (95, 219915), (135, 154755), (171, 122175), (181, 115425), (225, 92853), (243, 85975), (285, 73305), (405, 51585), (475, 43983), (513, 40725), (543, 38475), (675, 30951), (855, 24435), (905, 23085), (1215, 17195), (1425, 14661), (1539, 13575), (1629, 12825), (2025, 10317), (2565, 8145), (2715, 7695), (3439, 6075), (4275, 4887), (4525, 4617)]