890702020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{51131}}^1$

素因数の和:51220

約数の個数: 48

約数和(自身を含む): 2044461888

約数和(自身を除く): 1153759868

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 67, 130, 134, 260, 268, 335, 670, 871, 1340, 1742, 3484, 4355, 8710, 17420, 51131, 102262, 204524, 255655, 511310, 664703, 1022620, 1329406, 2658812, 3323515, 3425777, 6647030, 6851554, 13294060, 13703108, 17128885, 34257770, 44535101, 68515540, 89070202, 178140404, 222675505, 445351010, 890702020]

約数ペア:

[(1, 890702020), (2, 445351010), (4, 222675505), (5, 178140404), (10, 89070202), (13, 68515540), (20, 44535101), (26, 34257770), (52, 17128885), (65, 13703108), (67, 13294060), (130, 6851554), (134, 6647030), (260, 3425777), (268, 3323515), (335, 2658812), (670, 1329406), (871, 1022620), (1340, 664703), (1742, 511310), (3484, 255655), (4355, 204524), (8710, 102262), (17420, 51131)]