209212540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{7789}}^1$

素因数の和:7894

約数の個数: 48

約数和(自身を含む): 471139200

約数和(自身を除く): 261926660

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 79, 85, 158, 170, 316, 340, 395, 790, 1343, 1580, 2686, 5372, 6715, 7789, 13430, 15578, 26860, 31156, 38945, 77890, 132413, 155780, 264826, 529652, 615331, 662065, 1230662, 1324130, 2461324, 2648260, 3076655, 6153310, 10460627, 12306620, 20921254, 41842508, 52303135, 104606270, 209212540]

約数ペア:

[(1, 209212540), (2, 104606270), (4, 52303135), (5, 41842508), (10, 20921254), (17, 12306620), (20, 10460627), (34, 6153310), (68, 3076655), (79, 2648260), (85, 2461324), (158, 1324130), (170, 1230662), (316, 662065), (340, 615331), (395, 529652), (790, 264826), (1343, 155780), (1580, 132413), (2686, 77890), (5372, 38945), (6715, 31156), (7789, 26860), (13430, 15578)]