21140680

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2089}}^1$

素因数の和:2134

約数の個数: 64

約数和(自身を含む): 54172800

約数和(自身を除く): 33032120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 23, 40, 44, 46, 55, 88, 92, 110, 115, 184, 220, 230, 253, 440, 460, 506, 920, 1012, 1265, 2024, 2089, 2530, 4178, 5060, 8356, 10120, 10445, 16712, 20890, 22979, 41780, 45958, 48047, 83560, 91916, 96094, 114895, 183832, 192188, 229790, 240235, 384376, 459580, 480470, 528517, 919160, 960940, 1057034, 1921880, 2114068, 2642585, 4228136, 5285170, 10570340, 21140680]

約数ペア:

[(1, 21140680), (2, 10570340), (4, 5285170), (5, 4228136), (8, 2642585), (10, 2114068), (11, 1921880), (20, 1057034), (22, 960940), (23, 919160), (40, 528517), (44, 480470), (46, 459580), (55, 384376), (88, 240235), (92, 229790), (110, 192188), (115, 183832), (184, 114895), (220, 96094), (230, 91916), (253, 83560), (440, 48047), (460, 45958), (506, 41780), (920, 22979), (1012, 20890), (1265, 16712), (2024, 10445), (2089, 10120), (2530, 8356), (4178, 5060)]