20780704

素因数分解:

$2^5\times 7^2\times {\mathrm{29}}^1\times {\mathrm{457}}^1$

素因数の和:510

約数の個数: 72

約数和(自身を含む): 49340340

約数和(自身を除く): 28559636

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 29, 32, 49, 56, 58, 98, 112, 116, 196, 203, 224, 232, 392, 406, 457, 464, 784, 812, 914, 928, 1421, 1568, 1624, 1828, 2842, 3199, 3248, 3656, 5684, 6398, 6496, 7312, 11368, 12796, 13253, 14624, 22393, 22736, 25592, 26506, 44786, 45472, 51184, 53012, 89572, 92771, 102368, 106024, 179144, 185542, 212048, 358288, 371084, 424096, 649397, 716576, 742168, 1298794, 1484336, 2597588, 2968672, 5195176, 10390352, 20780704]

約数ペア:

[(1, 20780704), (2, 10390352), (4, 5195176), (7, 2968672), (8, 2597588), (14, 1484336), (16, 1298794), (28, 742168), (29, 716576), (32, 649397), (49, 424096), (56, 371084), (58, 358288), (98, 212048), (112, 185542), (116, 179144), (196, 106024), (203, 102368), (224, 92771), (232, 89572), (392, 53012), (406, 51184), (457, 45472), (464, 44786), (784, 26506), (812, 25592), (914, 22736), (928, 22393), (1421, 14624), (1568, 13253), (1624, 12796), (1828, 11368), (2842, 7312), (3199, 6496), (3248, 6398), (3656, 5684)]