20205640

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{13}}^2\times {\mathrm{61}}^1$

素因数の和:112

約数の個数: 144

約数和(自身を含む): 58204980

約数和(自身を除く): 37999340

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 35, 40, 49, 52, 56, 61, 65, 70, 91, 98, 104, 122, 130, 140, 169, 182, 196, 244, 245, 260, 280, 305, 338, 364, 392, 427, 455, 488, 490, 520, 610, 637, 676, 728, 793, 845, 854, 910, 980, 1183, 1220, 1274, 1352, 1586, 1690, 1708, 1820, 1960, 2135, 2366, 2440, 2548, 2989, 3172, 3185, 3380, 3416, 3640, 3965, 4270, 4732, 5096, 5551, 5915, 5978, 6344, 6370, 6760, 7930, 8281, 8540, 9464, 10309, 11102, 11830, 11956, 12740, 14945, 15860, 16562, 17080, 20618, 22204, 23660, 23912, 25480, 27755, 29890, 31720, 33124, 38857, 41236, 41405, 44408, 47320, 51545, 55510, 59780, 66248, 72163, 77714, 82472, 82810, 103090, 111020, 119560, 144326, 155428, 165620, 194285, 206180, 222040, 288652, 310856, 331240, 360815, 388570, 412360, 505141, 577304, 721630, 777140, 1010282, 1443260, 1554280, 2020564, 2525705, 2886520, 4041128, 5051410, 10102820, 20205640]

約数ペア:

[(1, 20205640), (2, 10102820), (4, 5051410), (5, 4041128), (7, 2886520), (8, 2525705), (10, 2020564), (13, 1554280), (14, 1443260), (20, 1010282), (26, 777140), (28, 721630), (35, 577304), (40, 505141), (49, 412360), (52, 388570), (56, 360815), (61, 331240), (65, 310856), (70, 288652), (91, 222040), (98, 206180), (104, 194285), (122, 165620), (130, 155428), (140, 144326), (169, 119560), (182, 111020), (196, 103090), (244, 82810), (245, 82472), (260, 77714), (280, 72163), (305, 66248), (338, 59780), (364, 55510), (392, 51545), (427, 47320), (455, 44408), (488, 41405), (490, 41236), (520, 38857), (610, 33124), (637, 31720), (676, 29890), (728, 27755), (793, 25480), (845, 23912), (854, 23660), (910, 22204), (980, 20618), (1183, 17080), (1220, 16562), (1274, 15860), (1352, 14945), (1586, 12740), (1690, 11956), (1708, 11830), (1820, 11102), (1960, 10309), (2135, 9464), (2366, 8540), (2440, 8281), (2548, 7930), (2989, 6760), (3172, 6370), (3185, 6344), (3380, 5978), (3416, 5915), (3640, 5551), (3965, 5096), (4270, 4732)]