28242520

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^1\times {\mathrm{97}}^1\times {\mathrm{251}}^1$

素因数の和:388

約数の個数: 64

約数和(自身を含む): 66679200

約数和(自身を除く): 38436680

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 97, 116, 145, 194, 232, 251, 290, 388, 485, 502, 580, 776, 970, 1004, 1160, 1255, 1940, 2008, 2510, 2813, 3880, 5020, 5626, 7279, 10040, 11252, 14065, 14558, 22504, 24347, 28130, 29116, 36395, 48694, 56260, 58232, 72790, 97388, 112520, 121735, 145580, 194776, 243470, 291160, 486940, 706063, 973880, 1412126, 2824252, 3530315, 5648504, 7060630, 14121260, 28242520]

約数ペア:

[(1, 28242520), (2, 14121260), (4, 7060630), (5, 5648504), (8, 3530315), (10, 2824252), (20, 1412126), (29, 973880), (40, 706063), (58, 486940), (97, 291160), (116, 243470), (145, 194776), (194, 145580), (232, 121735), (251, 112520), (290, 97388), (388, 72790), (485, 58232), (502, 56260), (580, 48694), (776, 36395), (970, 29116), (1004, 28130), (1160, 24347), (1255, 22504), (1940, 14558), (2008, 14065), (2510, 11252), (2813, 10040), (3880, 7279), (5020, 5626)]