20572240

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{151}}^1$

素因数の和:308

約数の個数: 80

約数和(自身を含む): 52246656

約数和(自身を除く): 31674416

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 131, 151, 208, 260, 262, 302, 520, 524, 604, 655, 755, 1040, 1048, 1208, 1310, 1510, 1703, 1963, 2096, 2416, 2620, 3020, 3406, 3926, 5240, 6040, 6812, 7852, 8515, 9815, 10480, 12080, 13624, 15704, 17030, 19630, 19781, 27248, 31408, 34060, 39260, 39562, 68120, 78520, 79124, 98905, 136240, 157040, 158248, 197810, 257153, 316496, 395620, 514306, 791240, 1028612, 1285765, 1582480, 2057224, 2571530, 4114448, 5143060, 10286120, 20572240]

約数ペア:

[(1, 20572240), (2, 10286120), (4, 5143060), (5, 4114448), (8, 2571530), (10, 2057224), (13, 1582480), (16, 1285765), (20, 1028612), (26, 791240), (40, 514306), (52, 395620), (65, 316496), (80, 257153), (104, 197810), (130, 158248), (131, 157040), (151, 136240), (208, 98905), (260, 79124), (262, 78520), (302, 68120), (520, 39562), (524, 39260), (604, 34060), (655, 31408), (755, 27248), (1040, 19781), (1048, 19630), (1208, 17030), (1310, 15704), (1510, 13624), (1703, 12080), (1963, 10480), (2096, 9815), (2416, 8515), (2620, 7852), (3020, 6812), (3406, 6040), (3926, 5240)]