21981780

素因数分解:

$2^2\times 3^5\times 5^1\times {\mathrm{4523}}^1$

素因数の和:4547

約数の個数: 72

約数和(自身を含む): 69162912

約数和(自身を除く): 47181132

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 27, 30, 36, 45, 54, 60, 81, 90, 108, 135, 162, 180, 243, 270, 324, 405, 486, 540, 810, 972, 1215, 1620, 2430, 4523, 4860, 9046, 13569, 18092, 22615, 27138, 40707, 45230, 54276, 67845, 81414, 90460, 122121, 135690, 162828, 203535, 244242, 271380, 366363, 407070, 488484, 610605, 732726, 814140, 1099089, 1221210, 1465452, 1831815, 2198178, 2442420, 3663630, 4396356, 5495445, 7327260, 10990890, 21981780]

約数ペア:

[(1, 21981780), (2, 10990890), (3, 7327260), (4, 5495445), (5, 4396356), (6, 3663630), (9, 2442420), (10, 2198178), (12, 1831815), (15, 1465452), (18, 1221210), (20, 1099089), (27, 814140), (30, 732726), (36, 610605), (45, 488484), (54, 407070), (60, 366363), (81, 271380), (90, 244242), (108, 203535), (135, 162828), (162, 135690), (180, 122121), (243, 90460), (270, 81414), (324, 67845), (405, 54276), (486, 45230), (540, 40707), (810, 27138), (972, 22615), (1215, 18092), (1620, 13569), (2430, 9046), (4523, 4860)]