21186220

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1\times {\mathrm{79}}^1$

素因数の和:175

約数の個数: 96

約数和(自身を含む): 52254720

約数和(自身を除く): 31068500

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 53, 55, 79, 92, 106, 110, 115, 158, 212, 220, 230, 253, 265, 316, 395, 460, 506, 530, 583, 790, 869, 1012, 1060, 1166, 1219, 1265, 1580, 1738, 1817, 2332, 2438, 2530, 2915, 3476, 3634, 4187, 4345, 4876, 5060, 5830, 6095, 7268, 8374, 8690, 9085, 11660, 12190, 13409, 16748, 17380, 18170, 19987, 20935, 24380, 26818, 36340, 39974, 41870, 46057, 53636, 67045, 79948, 83740, 92114, 96301, 99935, 134090, 184228, 192602, 199870, 230285, 268180, 385204, 399740, 460570, 481505, 921140, 963010, 1059311, 1926020, 2118622, 4237244, 5296555, 10593110, 21186220]

約数ペア:

[(1, 21186220), (2, 10593110), (4, 5296555), (5, 4237244), (10, 2118622), (11, 1926020), (20, 1059311), (22, 963010), (23, 921140), (44, 481505), (46, 460570), (53, 399740), (55, 385204), (79, 268180), (92, 230285), (106, 199870), (110, 192602), (115, 184228), (158, 134090), (212, 99935), (220, 96301), (230, 92114), (253, 83740), (265, 79948), (316, 67045), (395, 53636), (460, 46057), (506, 41870), (530, 39974), (583, 36340), (790, 26818), (869, 24380), (1012, 20935), (1060, 19987), (1166, 18170), (1219, 17380), (1265, 16748), (1580, 13409), (1738, 12190), (1817, 11660), (2332, 9085), (2438, 8690), (2530, 8374), (2915, 7268), (3476, 6095), (3634, 5830), (4187, 5060), (4345, 4876)]