18917860

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{29}}^1\times {\mathrm{193}}^1$

素因数の和:257

約数の個数: 72

約数和(自身を含む): 44732520

約数和(自身を除く): 25814660

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 29, 52, 58, 65, 116, 130, 145, 169, 193, 260, 290, 338, 377, 386, 580, 676, 754, 772, 845, 965, 1508, 1690, 1885, 1930, 2509, 3380, 3770, 3860, 4901, 5018, 5597, 7540, 9802, 10036, 11194, 12545, 19604, 22388, 24505, 25090, 27985, 32617, 49010, 50180, 55970, 65234, 72761, 98020, 111940, 130468, 145522, 163085, 291044, 326170, 363805, 652340, 727610, 945893, 1455220, 1891786, 3783572, 4729465, 9458930, 18917860]

約数ペア:

[(1, 18917860), (2, 9458930), (4, 4729465), (5, 3783572), (10, 1891786), (13, 1455220), (20, 945893), (26, 727610), (29, 652340), (52, 363805), (58, 326170), (65, 291044), (116, 163085), (130, 145522), (145, 130468), (169, 111940), (193, 98020), (260, 72761), (290, 65234), (338, 55970), (377, 50180), (386, 49010), (580, 32617), (676, 27985), (754, 25090), (772, 24505), (845, 22388), (965, 19604), (1508, 12545), (1690, 11194), (1885, 10036), (1930, 9802), (2509, 7540), (3380, 5597), (3770, 5018), (3860, 4901)]