28312020

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{79}}^1\times {\mathrm{181}}^1$

素因数の和:286

約数の個数: 144

約数和(自身を含む): 95397120

約数和(自身を除く): 67085100

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 30, 33, 36, 44, 45, 55, 60, 66, 79, 90, 99, 110, 132, 158, 165, 180, 181, 198, 220, 237, 316, 330, 362, 395, 396, 474, 495, 543, 660, 711, 724, 790, 869, 905, 948, 990, 1086, 1185, 1422, 1580, 1629, 1738, 1810, 1980, 1991, 2172, 2370, 2607, 2715, 2844, 3258, 3476, 3555, 3620, 3982, 4345, 4740, 5214, 5430, 5973, 6516, 7110, 7821, 7964, 8145, 8690, 9955, 10428, 10860, 11946, 13035, 14220, 14299, 15642, 16290, 17380, 17919, 19910, 23892, 26070, 28598, 29865, 31284, 32580, 35838, 39105, 39820, 42897, 52140, 57196, 59730, 71495, 71676, 78210, 85794, 89595, 119460, 128691, 142990, 156420, 157289, 171588, 179190, 214485, 257382, 285980, 314578, 358380, 428970, 471867, 514764, 629156, 643455, 786445, 857940, 943734, 1286910, 1415601, 1572890, 1887468, 2359335, 2573820, 2831202, 3145780, 4718670, 5662404, 7078005, 9437340, 14156010, 28312020]

約数ペア:

[(1, 28312020), (2, 14156010), (3, 9437340), (4, 7078005), (5, 5662404), (6, 4718670), (9, 3145780), (10, 2831202), (11, 2573820), (12, 2359335), (15, 1887468), (18, 1572890), (20, 1415601), (22, 1286910), (30, 943734), (33, 857940), (36, 786445), (44, 643455), (45, 629156), (55, 514764), (60, 471867), (66, 428970), (79, 358380), (90, 314578), (99, 285980), (110, 257382), (132, 214485), (158, 179190), (165, 171588), (180, 157289), (181, 156420), (198, 142990), (220, 128691), (237, 119460), (316, 89595), (330, 85794), (362, 78210), (395, 71676), (396, 71495), (474, 59730), (495, 57196), (543, 52140), (660, 42897), (711, 39820), (724, 39105), (790, 35838), (869, 32580), (905, 31284), (948, 29865), (990, 28598), (1086, 26070), (1185, 23892), (1422, 19910), (1580, 17919), (1629, 17380), (1738, 16290), (1810, 15642), (1980, 14299), (1991, 14220), (2172, 13035), (2370, 11946), (2607, 10860), (2715, 10428), (2844, 9955), (3258, 8690), (3476, 8145), (3555, 7964), (3620, 7821), (3982, 7110), (4345, 6516), (4740, 5973), (5214, 5430)]