20748560

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{79}}^1$

素因数の和:173

約数の個数: 120

約数和(自身を含む): 57674880

約数和(自身を除く): 36926320

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 67, 70, 79, 80, 98, 112, 134, 140, 158, 196, 245, 268, 280, 316, 335, 392, 395, 469, 490, 536, 553, 560, 632, 670, 784, 790, 938, 980, 1072, 1106, 1264, 1340, 1580, 1876, 1960, 2212, 2345, 2680, 2765, 3160, 3283, 3752, 3871, 3920, 4424, 4690, 5293, 5360, 5530, 6320, 6566, 7504, 7742, 8848, 9380, 10586, 11060, 13132, 15484, 16415, 18760, 19355, 21172, 22120, 26264, 26465, 30968, 32830, 37051, 37520, 38710, 42344, 44240, 52528, 52930, 61936, 65660, 74102, 77420, 84688, 105860, 131320, 148204, 154840, 185255, 211720, 259357, 262640, 296408, 309680, 370510, 423440, 518714, 592816, 741020, 1037428, 1296785, 1482040, 2074856, 2593570, 2964080, 4149712, 5187140, 10374280, 20748560]

約数ペア:

[(1, 20748560), (2, 10374280), (4, 5187140), (5, 4149712), (7, 2964080), (8, 2593570), (10, 2074856), (14, 1482040), (16, 1296785), (20, 1037428), (28, 741020), (35, 592816), (40, 518714), (49, 423440), (56, 370510), (67, 309680), (70, 296408), (79, 262640), (80, 259357), (98, 211720), (112, 185255), (134, 154840), (140, 148204), (158, 131320), (196, 105860), (245, 84688), (268, 77420), (280, 74102), (316, 65660), (335, 61936), (392, 52930), (395, 52528), (469, 44240), (490, 42344), (536, 38710), (553, 37520), (560, 37051), (632, 32830), (670, 30968), (784, 26465), (790, 26264), (938, 22120), (980, 21172), (1072, 19355), (1106, 18760), (1264, 16415), (1340, 15484), (1580, 13132), (1876, 11060), (1960, 10586), (2212, 9380), (2345, 8848), (2680, 7742), (2765, 7504), (3160, 6566), (3283, 6320), (3752, 5530), (3871, 5360), (3920, 5293), (4424, 4690)]