81273780

素因数分解:

$2^2\times 3^5\times 5^1\times 7^1\times {\mathrm{2389}}^1$

素因数の和:2420

約数の個数: 144

約数和(自身を含む): 292306560

約数和(自身を除く): 211032780

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 27, 28, 30, 35, 36, 42, 45, 54, 60, 63, 70, 81, 84, 90, 105, 108, 126, 135, 140, 162, 180, 189, 210, 243, 252, 270, 315, 324, 378, 405, 420, 486, 540, 567, 630, 756, 810, 945, 972, 1134, 1215, 1260, 1620, 1701, 1890, 2268, 2389, 2430, 2835, 3402, 3780, 4778, 4860, 5670, 6804, 7167, 8505, 9556, 11340, 11945, 14334, 16723, 17010, 21501, 23890, 28668, 33446, 34020, 35835, 43002, 47780, 50169, 64503, 66892, 71670, 83615, 86004, 100338, 107505, 129006, 143340, 150507, 167230, 193509, 200676, 215010, 250845, 258012, 301014, 322515, 334460, 387018, 430020, 451521, 501690, 580527, 602028, 645030, 752535, 774036, 903042, 967545, 1003380, 1161054, 1290060, 1354563, 1505070, 1806084, 1935090, 2257605, 2322108, 2709126, 2902635, 3010140, 3870180, 4063689, 4515210, 5418252, 5805270, 6772815, 8127378, 9030420, 11610540, 13545630, 16254756, 20318445, 27091260, 40636890, 81273780]

約数ペア:

[(1, 81273780), (2, 40636890), (3, 27091260), (4, 20318445), (5, 16254756), (6, 13545630), (7, 11610540), (9, 9030420), (10, 8127378), (12, 6772815), (14, 5805270), (15, 5418252), (18, 4515210), (20, 4063689), (21, 3870180), (27, 3010140), (28, 2902635), (30, 2709126), (35, 2322108), (36, 2257605), (42, 1935090), (45, 1806084), (54, 1505070), (60, 1354563), (63, 1290060), (70, 1161054), (81, 1003380), (84, 967545), (90, 903042), (105, 774036), (108, 752535), (126, 645030), (135, 602028), (140, 580527), (162, 501690), (180, 451521), (189, 430020), (210, 387018), (243, 334460), (252, 322515), (270, 301014), (315, 258012), (324, 250845), (378, 215010), (405, 200676), (420, 193509), (486, 167230), (540, 150507), (567, 143340), (630, 129006), (756, 107505), (810, 100338), (945, 86004), (972, 83615), (1134, 71670), (1215, 66892), (1260, 64503), (1620, 50169), (1701, 47780), (1890, 43002), (2268, 35835), (2389, 34020), (2430, 33446), (2835, 28668), (3402, 23890), (3780, 21501), (4778, 17010), (4860, 16723), (5670, 14334), (6804, 11945), (7167, 11340), (8505, 9556)]