21201075

素因数分解:

$3^3\times 5^2\times 7^2\times {\mathrm{641}}^1$

素因数の和:674

約数の個数: 72

約数和(自身を含む): 45376560

約数和(自身を除く): 24175485

約数列:

[1, 3, 5, 7, 9, 15, 21, 25, 27, 35, 45, 49, 63, 75, 105, 135, 147, 175, 189, 225, 245, 315, 441, 525, 641, 675, 735, 945, 1225, 1323, 1575, 1923, 2205, 3205, 3675, 4487, 4725, 5769, 6615, 9615, 11025, 13461, 16025, 17307, 22435, 28845, 31409, 33075, 40383, 48075, 67305, 86535, 94227, 112175, 121149, 144225, 157045, 201915, 282681, 336525, 432675, 471135, 605745, 785225, 848043, 1009575, 1413405, 2355675, 3028725, 4240215, 7067025, 21201075]

約数ペア:

[(1, 21201075), (3, 7067025), (5, 4240215), (7, 3028725), (9, 2355675), (15, 1413405), (21, 1009575), (25, 848043), (27, 785225), (35, 605745), (45, 471135), (49, 432675), (63, 336525), (75, 282681), (105, 201915), (135, 157045), (147, 144225), (175, 121149), (189, 112175), (225, 94227), (245, 86535), (315, 67305), (441, 48075), (525, 40383), (641, 33075), (675, 31409), (735, 28845), (945, 22435), (1225, 17307), (1323, 16025), (1575, 13461), (1923, 11025), (2205, 9615), (3205, 6615), (3675, 5769), (4487, 4725)]