20723690

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{239}}^1$

素因数の和:311

約数の個数: 64

約数和(自身を含む): 43545600

約数和(自身を除く): 22821910

約数列:

[1, 2, 5, 10, 13, 23, 26, 29, 46, 58, 65, 115, 130, 145, 230, 239, 290, 299, 377, 478, 598, 667, 754, 1195, 1334, 1495, 1885, 2390, 2990, 3107, 3335, 3770, 5497, 6214, 6670, 6931, 8671, 10994, 13862, 15535, 17342, 27485, 31070, 34655, 43355, 54970, 69310, 71461, 86710, 90103, 142922, 159413, 180206, 318826, 357305, 450515, 714610, 797065, 901030, 1594130, 2072369, 4144738, 10361845, 20723690]

約数ペア:

[(1, 20723690), (2, 10361845), (5, 4144738), (10, 2072369), (13, 1594130), (23, 901030), (26, 797065), (29, 714610), (46, 450515), (58, 357305), (65, 318826), (115, 180206), (130, 159413), (145, 142922), (230, 90103), (239, 86710), (290, 71461), (299, 69310), (377, 54970), (478, 43355), (598, 34655), (667, 31070), (754, 27485), (1195, 17342), (1334, 15535), (1495, 13862), (1885, 10994), (2390, 8671), (2990, 6931), (3107, 6670), (3335, 6214), (3770, 5497)]