21990294

素因数分解:

$2^1\times 3^2\times {\mathrm{29}}^1\times {\mathrm{103}}^1\times {\mathrm{409}}^1$

素因数の和:549

約数の個数: 48

約数和(自身を含む): 49888800

約数和(自身を除く): 27898506

約数列:

[1, 2, 3, 6, 9, 18, 29, 58, 87, 103, 174, 206, 261, 309, 409, 522, 618, 818, 927, 1227, 1854, 2454, 2987, 3681, 5974, 7362, 8961, 11861, 17922, 23722, 26883, 35583, 42127, 53766, 71166, 84254, 106749, 126381, 213498, 252762, 379143, 758286, 1221683, 2443366, 3665049, 7330098, 10995147, 21990294]

約数ペア:

[(1, 21990294), (2, 10995147), (3, 7330098), (6, 3665049), (9, 2443366), (18, 1221683), (29, 758286), (58, 379143), (87, 252762), (103, 213498), (174, 126381), (206, 106749), (261, 84254), (309, 71166), (409, 53766), (522, 42127), (618, 35583), (818, 26883), (927, 23722), (1227, 17922), (1854, 11861), (2454, 8961), (2987, 7362), (3681, 5974)]