20505160

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{839}}^1$

素因数の和:910

約数の個数: 64

約数和(自身を含む): 50803200

約数和(自身を除く): 30298040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 47, 52, 65, 94, 104, 130, 188, 235, 260, 376, 470, 520, 611, 839, 940, 1222, 1678, 1880, 2444, 3055, 3356, 4195, 4888, 6110, 6712, 8390, 10907, 12220, 16780, 21814, 24440, 33560, 39433, 43628, 54535, 78866, 87256, 109070, 157732, 197165, 218140, 315464, 394330, 436280, 512629, 788660, 1025258, 1577320, 2050516, 2563145, 4101032, 5126290, 10252580, 20505160]

約数ペア:

[(1, 20505160), (2, 10252580), (4, 5126290), (5, 4101032), (8, 2563145), (10, 2050516), (13, 1577320), (20, 1025258), (26, 788660), (40, 512629), (47, 436280), (52, 394330), (65, 315464), (94, 218140), (104, 197165), (130, 157732), (188, 109070), (235, 87256), (260, 78866), (376, 54535), (470, 43628), (520, 39433), (611, 33560), (839, 24440), (940, 21814), (1222, 16780), (1678, 12220), (1880, 10907), (2444, 8390), (3055, 6712), (3356, 6110), (4195, 4888)]