20879740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{283}}^1$

素因数の和:347

約数の個数: 96

約数和(自身を含む): 54964224

約数和(自身を除く): 34084484

約数列:

[1, 2, 4, 5, 7, 10, 14, 17, 20, 28, 31, 34, 35, 62, 68, 70, 85, 119, 124, 140, 155, 170, 217, 238, 283, 310, 340, 434, 476, 527, 566, 595, 620, 868, 1054, 1085, 1132, 1190, 1415, 1981, 2108, 2170, 2380, 2635, 2830, 3689, 3962, 4340, 4811, 5270, 5660, 7378, 7924, 8773, 9622, 9905, 10540, 14756, 17546, 18445, 19244, 19810, 24055, 33677, 35092, 36890, 39620, 43865, 48110, 61411, 67354, 73780, 87730, 96220, 122822, 134708, 149141, 168385, 175460, 245644, 298282, 307055, 336770, 596564, 614110, 673540, 745705, 1043987, 1228220, 1491410, 2087974, 2982820, 4175948, 5219935, 10439870, 20879740]

約数ペア:

[(1, 20879740), (2, 10439870), (4, 5219935), (5, 4175948), (7, 2982820), (10, 2087974), (14, 1491410), (17, 1228220), (20, 1043987), (28, 745705), (31, 673540), (34, 614110), (35, 596564), (62, 336770), (68, 307055), (70, 298282), (85, 245644), (119, 175460), (124, 168385), (140, 149141), (155, 134708), (170, 122822), (217, 96220), (238, 87730), (283, 73780), (310, 67354), (340, 61411), (434, 48110), (476, 43865), (527, 39620), (566, 36890), (595, 35092), (620, 33677), (868, 24055), (1054, 19810), (1085, 19244), (1132, 18445), (1190, 17546), (1415, 14756), (1981, 10540), (2108, 9905), (2170, 9622), (2380, 8773), (2635, 7924), (2830, 7378), (3689, 5660), (3962, 5270), (4340, 4811)]