209215820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:455

約数の個数: 96

約数和(自身を含む): 505128960

約数和(自身を除く): 295913140

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 44, 46, 55, 92, 110, 115, 173, 220, 230, 239, 253, 346, 460, 478, 506, 692, 865, 956, 1012, 1195, 1265, 1730, 1903, 2390, 2530, 2629, 3460, 3806, 3979, 4780, 5060, 5258, 5497, 7612, 7958, 9515, 10516, 10994, 13145, 15916, 19030, 19895, 21988, 26290, 27485, 38060, 39790, 41347, 43769, 52580, 54970, 60467, 79580, 82694, 87538, 109940, 120934, 165388, 175076, 206735, 218845, 241868, 302335, 413470, 437690, 454817, 604670, 826940, 875380, 909634, 950981, 1209340, 1819268, 1901962, 2274085, 3803924, 4548170, 4754905, 9096340, 9509810, 10460791, 19019620, 20921582, 41843164, 52303955, 104607910, 209215820]

約数ペア:

[(1, 209215820), (2, 104607910), (4, 52303955), (5, 41843164), (10, 20921582), (11, 19019620), (20, 10460791), (22, 9509810), (23, 9096340), (44, 4754905), (46, 4548170), (55, 3803924), (92, 2274085), (110, 1901962), (115, 1819268), (173, 1209340), (220, 950981), (230, 909634), (239, 875380), (253, 826940), (346, 604670), (460, 454817), (478, 437690), (506, 413470), (692, 302335), (865, 241868), (956, 218845), (1012, 206735), (1195, 175076), (1265, 165388), (1730, 120934), (1903, 109940), (2390, 87538), (2530, 82694), (2629, 79580), (3460, 60467), (3806, 54970), (3979, 52580), (4780, 43769), (5060, 41347), (5258, 39790), (5497, 38060), (7612, 27485), (7958, 26290), (9515, 21988), (10516, 19895), (10994, 19030), (13145, 15916)]