21045780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^1\times {\mathrm{16703}}^1$

素因数の和:16725

約数の個数: 72

約数和(自身を含む): 72963072

約数和(自身を除く): 51917292

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, 1260, 16703, 33406, 50109, 66812, 83515, 100218, 116921, 150327, 167030, 200436, 233842, 250545, 300654, 334060, 350763, 467684, 501090, 584605, 601308, 701526, 751635, 1002180, 1052289, 1169210, 1403052, 1503270, 1753815, 2104578, 2338420, 3006540, 3507630, 4209156, 5261445, 7015260, 10522890, 21045780]

約数ペア:

[(1, 21045780), (2, 10522890), (3, 7015260), (4, 5261445), (5, 4209156), (6, 3507630), (7, 3006540), (9, 2338420), (10, 2104578), (12, 1753815), (14, 1503270), (15, 1403052), (18, 1169210), (20, 1052289), (21, 1002180), (28, 751635), (30, 701526), (35, 601308), (36, 584605), (42, 501090), (45, 467684), (60, 350763), (63, 334060), (70, 300654), (84, 250545), (90, 233842), (105, 200436), (126, 167030), (140, 150327), (180, 116921), (210, 100218), (252, 83515), (315, 66812), (420, 50109), (630, 33406), (1260, 16703)]