81957720

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{491}}^1$

素因数の和:625

約数の個数: 128

約数和(自身を含む): 267805440

約数和(自身を除く): 185847720

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 65, 78, 104, 107, 120, 130, 156, 195, 214, 260, 312, 321, 390, 428, 491, 520, 535, 642, 780, 856, 982, 1070, 1284, 1391, 1473, 1560, 1605, 1964, 2140, 2455, 2568, 2782, 2946, 3210, 3928, 4173, 4280, 4910, 5564, 5892, 6383, 6420, 6955, 7365, 8346, 9820, 11128, 11784, 12766, 12840, 13910, 14730, 16692, 19149, 19640, 20865, 25532, 27820, 29460, 31915, 33384, 38298, 41730, 51064, 52537, 55640, 58920, 63830, 76596, 83460, 95745, 105074, 127660, 153192, 157611, 166920, 191490, 210148, 255320, 262685, 315222, 382980, 420296, 525370, 630444, 682981, 765960, 788055, 1050740, 1260888, 1365962, 1576110, 2048943, 2101480, 2731924, 3152220, 3414905, 4097886, 5463848, 6304440, 6829810, 8195772, 10244715, 13659620, 16391544, 20489430, 27319240, 40978860, 81957720]

約数ペア:

[(1, 81957720), (2, 40978860), (3, 27319240), (4, 20489430), (5, 16391544), (6, 13659620), (8, 10244715), (10, 8195772), (12, 6829810), (13, 6304440), (15, 5463848), (20, 4097886), (24, 3414905), (26, 3152220), (30, 2731924), (39, 2101480), (40, 2048943), (52, 1576110), (60, 1365962), (65, 1260888), (78, 1050740), (104, 788055), (107, 765960), (120, 682981), (130, 630444), (156, 525370), (195, 420296), (214, 382980), (260, 315222), (312, 262685), (321, 255320), (390, 210148), (428, 191490), (491, 166920), (520, 157611), (535, 153192), (642, 127660), (780, 105074), (856, 95745), (982, 83460), (1070, 76596), (1284, 63830), (1391, 58920), (1473, 55640), (1560, 52537), (1605, 51064), (1964, 41730), (2140, 38298), (2455, 33384), (2568, 31915), (2782, 29460), (2946, 27820), (3210, 25532), (3928, 20865), (4173, 19640), (4280, 19149), (4910, 16692), (5564, 14730), (5892, 13910), (6383, 12840), (6420, 12766), (6955, 11784), (7365, 11128), (8346, 9820)]