28746640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{211}}^1$

素因数の和:368

約数の個数: 80

約数和(自身を含む): 72870336

約数和(自身を除く): 44123696

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 131, 208, 211, 260, 262, 422, 520, 524, 655, 844, 1040, 1048, 1055, 1310, 1688, 1703, 2096, 2110, 2620, 2743, 3376, 3406, 4220, 5240, 5486, 6812, 8440, 8515, 10480, 10972, 13624, 13715, 16880, 17030, 21944, 27248, 27430, 27641, 34060, 43888, 54860, 55282, 68120, 109720, 110564, 136240, 138205, 219440, 221128, 276410, 359333, 442256, 552820, 718666, 1105640, 1437332, 1796665, 2211280, 2874664, 3593330, 5749328, 7186660, 14373320, 28746640]

約数ペア:

[(1, 28746640), (2, 14373320), (4, 7186660), (5, 5749328), (8, 3593330), (10, 2874664), (13, 2211280), (16, 1796665), (20, 1437332), (26, 1105640), (40, 718666), (52, 552820), (65, 442256), (80, 359333), (104, 276410), (130, 221128), (131, 219440), (208, 138205), (211, 136240), (260, 110564), (262, 109720), (422, 68120), (520, 55282), (524, 54860), (655, 43888), (844, 34060), (1040, 27641), (1048, 27430), (1055, 27248), (1310, 21944), (1688, 17030), (1703, 16880), (2096, 13715), (2110, 13624), (2620, 10972), (2743, 10480), (3376, 8515), (3406, 8440), (4220, 6812), (5240, 5486)]