21254080

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3907}}^1$

素因数の和:3941

約数の個数: 56

約数和(自身を含む): 53602128

約数和(自身を除く): 32348048

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3907, 5440, 7814, 15628, 19535, 31256, 39070, 62512, 66419, 78140, 125024, 132838, 156280, 250048, 265676, 312560, 332095, 531352, 625120, 664190, 1062704, 1250240, 1328380, 2125408, 2656760, 4250816, 5313520, 10627040, 21254080]

約数ペア:

[(1, 21254080), (2, 10627040), (4, 5313520), (5, 4250816), (8, 2656760), (10, 2125408), (16, 1328380), (17, 1250240), (20, 1062704), (32, 664190), (34, 625120), (40, 531352), (64, 332095), (68, 312560), (80, 265676), (85, 250048), (136, 156280), (160, 132838), (170, 125024), (272, 78140), (320, 66419), (340, 62512), (544, 39070), (680, 31256), (1088, 19535), (1360, 15628), (2720, 7814), (3907, 5440)]