21885416

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{307}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 50265600

約数和(自身を除く): 28380184

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 67, 76, 133, 134, 152, 266, 268, 307, 469, 532, 536, 614, 938, 1064, 1228, 1273, 1876, 2149, 2456, 2546, 3752, 4298, 5092, 5833, 8596, 8911, 10184, 11666, 17192, 17822, 20569, 23332, 35644, 40831, 41138, 46664, 71288, 81662, 82276, 143983, 163324, 164552, 287966, 326648, 390811, 575932, 781622, 1151864, 1563244, 2735677, 3126488, 5471354, 10942708, 21885416]

約数ペア:

[(1, 21885416), (2, 10942708), (4, 5471354), (7, 3126488), (8, 2735677), (14, 1563244), (19, 1151864), (28, 781622), (38, 575932), (56, 390811), (67, 326648), (76, 287966), (133, 164552), (134, 163324), (152, 143983), (266, 82276), (268, 81662), (307, 71288), (469, 46664), (532, 41138), (536, 40831), (614, 35644), (938, 23332), (1064, 20569), (1228, 17822), (1273, 17192), (1876, 11666), (2149, 10184), (2456, 8911), (2546, 8596), (3752, 5833), (4298, 5092)]