20985132

素因数分解:

$2^2\times 3^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{401}}^1$

素因数の和:511

約数の個数: 72

約数和(自身を含む): 57743280

約数和(自身を除く): 36758148

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 49, 84, 89, 98, 147, 178, 196, 267, 294, 356, 401, 534, 588, 623, 802, 1068, 1203, 1246, 1604, 1869, 2406, 2492, 2807, 3738, 4361, 4812, 5614, 7476, 8421, 8722, 11228, 13083, 16842, 17444, 19649, 26166, 33684, 35689, 39298, 52332, 58947, 71378, 78596, 107067, 117894, 142756, 214134, 235788, 249823, 428268, 499646, 749469, 999292, 1498938, 1748761, 2997876, 3497522, 5246283, 6995044, 10492566, 20985132]

約数ペア:

[(1, 20985132), (2, 10492566), (3, 6995044), (4, 5246283), (6, 3497522), (7, 2997876), (12, 1748761), (14, 1498938), (21, 999292), (28, 749469), (42, 499646), (49, 428268), (84, 249823), (89, 235788), (98, 214134), (147, 142756), (178, 117894), (196, 107067), (267, 78596), (294, 71378), (356, 58947), (401, 52332), (534, 39298), (588, 35689), (623, 33684), (802, 26166), (1068, 19649), (1203, 17444), (1246, 16842), (1604, 13083), (1869, 11228), (2406, 8722), (2492, 8421), (2807, 7476), (3738, 5614), (4361, 4812)]