20421500

素因数分解:

$2^2\times 5^3\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{79}}^1$

素因数の和:156

約数の個数: 96

約数和(自身を含む): 50319360

約数和(自身を除く): 29897860

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 47, 50, 55, 79, 94, 100, 110, 125, 158, 188, 220, 235, 250, 275, 316, 395, 470, 500, 517, 550, 790, 869, 940, 1034, 1100, 1175, 1375, 1580, 1738, 1975, 2068, 2350, 2585, 2750, 3476, 3713, 3950, 4345, 4700, 5170, 5500, 5875, 7426, 7900, 8690, 9875, 10340, 11750, 12925, 14852, 17380, 18565, 19750, 21725, 23500, 25850, 37130, 39500, 40843, 43450, 51700, 64625, 74260, 81686, 86900, 92825, 108625, 129250, 163372, 185650, 204215, 217250, 258500, 371300, 408430, 434500, 464125, 816860, 928250, 1021075, 1856500, 2042150, 4084300, 5105375, 10210750, 20421500]

約数ペア:

[(1, 20421500), (2, 10210750), (4, 5105375), (5, 4084300), (10, 2042150), (11, 1856500), (20, 1021075), (22, 928250), (25, 816860), (44, 464125), (47, 434500), (50, 408430), (55, 371300), (79, 258500), (94, 217250), (100, 204215), (110, 185650), (125, 163372), (158, 129250), (188, 108625), (220, 92825), (235, 86900), (250, 81686), (275, 74260), (316, 64625), (395, 51700), (470, 43450), (500, 40843), (517, 39500), (550, 37130), (790, 25850), (869, 23500), (940, 21725), (1034, 19750), (1100, 18565), (1175, 17380), (1375, 14852), (1580, 12925), (1738, 11750), (1975, 10340), (2068, 9875), (2350, 8690), (2585, 7900), (2750, 7426), (3476, 5875), (3713, 5500), (3950, 5170), (4345, 4700)]