20210540

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{41}}^1\times {\mathrm{503}}^1$

素因数の和:567

約数の個数: 72

約数和(自身を含む): 50676192

約数和(自身を除く): 30465652

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 41, 49, 70, 82, 98, 140, 164, 196, 205, 245, 287, 410, 490, 503, 574, 820, 980, 1006, 1148, 1435, 2009, 2012, 2515, 2870, 3521, 4018, 5030, 5740, 7042, 8036, 10045, 10060, 14084, 17605, 20090, 20623, 24647, 35210, 40180, 41246, 49294, 70420, 82492, 98588, 103115, 123235, 144361, 206230, 246470, 288722, 412460, 492940, 577444, 721805, 1010527, 1443610, 2021054, 2887220, 4042108, 5052635, 10105270, 20210540]

約数ペア:

[(1, 20210540), (2, 10105270), (4, 5052635), (5, 4042108), (7, 2887220), (10, 2021054), (14, 1443610), (20, 1010527), (28, 721805), (35, 577444), (41, 492940), (49, 412460), (70, 288722), (82, 246470), (98, 206230), (140, 144361), (164, 123235), (196, 103115), (205, 98588), (245, 82492), (287, 70420), (410, 49294), (490, 41246), (503, 40180), (574, 35210), (820, 24647), (980, 20623), (1006, 20090), (1148, 17605), (1435, 14084), (2009, 10060), (2012, 10045), (2515, 8036), (2870, 7042), (3521, 5740), (4018, 5030)]