20342840

素因数分解:

$2^3\times 5^1\times 7^2\times {\mathrm{97}}^1\times {\mathrm{107}}^1$

素因数の和:229

約数の個数: 96

約数和(自身を含む): 54295920

約数和(自身を除く): 33953080

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 49, 56, 70, 97, 98, 107, 140, 194, 196, 214, 245, 280, 388, 392, 428, 485, 490, 535, 679, 749, 776, 856, 970, 980, 1070, 1358, 1498, 1940, 1960, 2140, 2716, 2996, 3395, 3745, 3880, 4280, 4753, 5243, 5432, 5992, 6790, 7490, 9506, 10379, 10486, 13580, 14980, 19012, 20758, 20972, 23765, 26215, 27160, 29960, 38024, 41516, 41944, 47530, 51895, 52430, 72653, 83032, 95060, 103790, 104860, 145306, 190120, 207580, 209720, 290612, 363265, 415160, 508571, 581224, 726530, 1017142, 1453060, 2034284, 2542855, 2906120, 4068568, 5085710, 10171420, 20342840]

約数ペア:

[(1, 20342840), (2, 10171420), (4, 5085710), (5, 4068568), (7, 2906120), (8, 2542855), (10, 2034284), (14, 1453060), (20, 1017142), (28, 726530), (35, 581224), (40, 508571), (49, 415160), (56, 363265), (70, 290612), (97, 209720), (98, 207580), (107, 190120), (140, 145306), (194, 104860), (196, 103790), (214, 95060), (245, 83032), (280, 72653), (388, 52430), (392, 51895), (428, 47530), (485, 41944), (490, 41516), (535, 38024), (679, 29960), (749, 27160), (776, 26215), (856, 23765), (970, 20972), (980, 20758), (1070, 19012), (1358, 14980), (1498, 13580), (1940, 10486), (1960, 10379), (2140, 9506), (2716, 7490), (2996, 6790), (3395, 5992), (3745, 5432), (3880, 5243), (4280, 4753)]