21181890

素因数分解:

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

素因数の和:387

約数の個数: 64

約数和(自身を含む): 53343360

約数和(自身を除く): 32161470

約数列:

[1, 2, 3, 5, 6, 10, 15, 29, 30, 58, 87, 97, 145, 174, 194, 251, 290, 291, 435, 485, 502, 582, 753, 870, 970, 1255, 1455, 1506, 2510, 2813, 2910, 3765, 5626, 7279, 7530, 8439, 14065, 14558, 16878, 21837, 24347, 28130, 36395, 42195, 43674, 48694, 72790, 73041, 84390, 109185, 121735, 146082, 218370, 243470, 365205, 706063, 730410, 1412126, 2118189, 3530315, 4236378, 7060630, 10590945, 21181890]

約数ペア:

[(1, 21181890), (2, 10590945), (3, 7060630), (5, 4236378), (6, 3530315), (10, 2118189), (15, 1412126), (29, 730410), (30, 706063), (58, 365205), (87, 243470), (97, 218370), (145, 146082), (174, 121735), (194, 109185), (251, 84390), (290, 73041), (291, 72790), (435, 48694), (485, 43674), (502, 42195), (582, 36395), (753, 28130), (870, 24347), (970, 21837), (1255, 16878), (1455, 14558), (1506, 14065), (2510, 8439), (2813, 7530), (2910, 7279), (3765, 5626)]