20945870

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{487}}^1$

素因数の和:545

約数の個数: 64

約数和(自身を含む): 45536256

約数和(自身を除く): 24590386

約数列:

[1, 2, 5, 10, 11, 17, 22, 23, 34, 46, 55, 85, 110, 115, 170, 187, 230, 253, 374, 391, 487, 506, 782, 935, 974, 1265, 1870, 1955, 2435, 2530, 3910, 4301, 4870, 5357, 8279, 8602, 10714, 11201, 16558, 21505, 22402, 26785, 41395, 43010, 53570, 56005, 82790, 91069, 112010, 123211, 182138, 190417, 246422, 380834, 455345, 616055, 910690, 952085, 1232110, 1904170, 2094587, 4189174, 10472935, 20945870]

約数ペア:

[(1, 20945870), (2, 10472935), (5, 4189174), (10, 2094587), (11, 1904170), (17, 1232110), (22, 952085), (23, 910690), (34, 616055), (46, 455345), (55, 380834), (85, 246422), (110, 190417), (115, 182138), (170, 123211), (187, 112010), (230, 91069), (253, 82790), (374, 56005), (391, 53570), (487, 43010), (506, 41395), (782, 26785), (935, 22402), (974, 21505), (1265, 16558), (1870, 11201), (1955, 10714), (2435, 8602), (2530, 8279), (3910, 5357), (4301, 4870)]