27988120

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{79}}^1\times {\mathrm{521}}^1$

素因数の和:628

約数の個数: 64

約数和(自身を含む): 67651200

約数和(自身を除く): 39663080

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 79, 85, 136, 158, 170, 316, 340, 395, 521, 632, 680, 790, 1042, 1343, 1580, 2084, 2605, 2686, 3160, 4168, 5210, 5372, 6715, 8857, 10420, 10744, 13430, 17714, 20840, 26860, 35428, 41159, 44285, 53720, 70856, 82318, 88570, 164636, 177140, 205795, 329272, 354280, 411590, 699703, 823180, 1399406, 1646360, 2798812, 3498515, 5597624, 6997030, 13994060, 27988120]

約数ペア:

[(1, 27988120), (2, 13994060), (4, 6997030), (5, 5597624), (8, 3498515), (10, 2798812), (17, 1646360), (20, 1399406), (34, 823180), (40, 699703), (68, 411590), (79, 354280), (85, 329272), (136, 205795), (158, 177140), (170, 164636), (316, 88570), (340, 82318), (395, 70856), (521, 53720), (632, 44285), (680, 41159), (790, 35428), (1042, 26860), (1343, 20840), (1580, 17714), (2084, 13430), (2605, 10744), (2686, 10420), (3160, 8857), (4168, 6715), (5210, 5372)]