21385800

素因数分解:

$2^3\times 3^2\times 5^2\times {\mathrm{109}}^2$

素因数の和:240

約数の個数: 108

約数和(自身を含む): 72485595

約数和(自身を除く): 51099795

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 25, 30, 36, 40, 45, 50, 60, 72, 75, 90, 100, 109, 120, 150, 180, 200, 218, 225, 300, 327, 360, 436, 450, 545, 600, 654, 872, 900, 981, 1090, 1308, 1635, 1800, 1962, 2180, 2616, 2725, 3270, 3924, 4360, 4905, 5450, 6540, 7848, 8175, 9810, 10900, 11881, 13080, 16350, 19620, 21800, 23762, 24525, 32700, 35643, 39240, 47524, 49050, 59405, 65400, 71286, 95048, 98100, 106929, 118810, 142572, 178215, 196200, 213858, 237620, 285144, 297025, 356430, 427716, 475240, 534645, 594050, 712860, 855432, 891075, 1069290, 1188100, 1425720, 1782150, 2138580, 2376200, 2673225, 3564300, 4277160, 5346450, 7128600, 10692900, 21385800]

約数ペア:

[(1, 21385800), (2, 10692900), (3, 7128600), (4, 5346450), (5, 4277160), (6, 3564300), (8, 2673225), (9, 2376200), (10, 2138580), (12, 1782150), (15, 1425720), (18, 1188100), (20, 1069290), (24, 891075), (25, 855432), (30, 712860), (36, 594050), (40, 534645), (45, 475240), (50, 427716), (60, 356430), (72, 297025), (75, 285144), (90, 237620), (100, 213858), (109, 196200), (120, 178215), (150, 142572), (180, 118810), (200, 106929), (218, 98100), (225, 95048), (300, 71286), (327, 65400), (360, 59405), (436, 49050), (450, 47524), (545, 39240), (600, 35643), (654, 32700), (872, 24525), (900, 23762), (981, 21800), (1090, 19620), (1308, 16350), (1635, 13080), (1800, 11881), (1962, 10900), (2180, 9810), (2616, 8175), (2725, 7848), (3270, 6540), (3924, 5450), (4360, 4905)]