20657780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:297

約数の個数: 96

約数和(自身を含む): 52835328

約数和(自身を除く): 32177548

約数列:

[1, 2, 4, 5, 10, 11, 13, 20, 22, 26, 31, 44, 52, 55, 62, 65, 110, 124, 130, 143, 155, 220, 233, 260, 286, 310, 341, 403, 466, 572, 620, 682, 715, 806, 932, 1165, 1364, 1430, 1612, 1705, 2015, 2330, 2563, 2860, 3029, 3410, 4030, 4433, 4660, 5126, 6058, 6820, 7223, 8060, 8866, 10252, 12116, 12815, 14446, 15145, 17732, 22165, 25630, 28892, 30290, 33319, 36115, 44330, 51260, 60580, 66638, 72230, 79453, 88660, 93899, 133276, 144460, 158906, 166595, 187798, 317812, 333190, 375596, 397265, 469495, 666380, 794530, 938990, 1032889, 1589060, 1877980, 2065778, 4131556, 5164445, 10328890, 20657780]

約数ペア:

[(1, 20657780), (2, 10328890), (4, 5164445), (5, 4131556), (10, 2065778), (11, 1877980), (13, 1589060), (20, 1032889), (22, 938990), (26, 794530), (31, 666380), (44, 469495), (52, 397265), (55, 375596), (62, 333190), (65, 317812), (110, 187798), (124, 166595), (130, 158906), (143, 144460), (155, 133276), (220, 93899), (233, 88660), (260, 79453), (286, 72230), (310, 66638), (341, 60580), (403, 51260), (466, 44330), (572, 36115), (620, 33319), (682, 30290), (715, 28892), (806, 25630), (932, 22165), (1165, 17732), (1364, 15145), (1430, 14446), (1612, 12815), (1705, 12116), (2015, 10252), (2330, 8866), (2563, 8060), (2860, 7223), (3029, 6820), (3410, 6058), (4030, 5126), (4433, 4660)]