21617420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{97}}^1\times {\mathrm{1013}}^1$

素因数の和:1130

約数の個数: 48

約数和(自身を含む): 50083488

約数和(自身を除く): 28466068

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 97, 110, 194, 220, 388, 485, 970, 1013, 1067, 1940, 2026, 2134, 4052, 4268, 5065, 5335, 10130, 10670, 11143, 20260, 21340, 22286, 44572, 55715, 98261, 111430, 196522, 222860, 393044, 491305, 982610, 1080871, 1965220, 2161742, 4323484, 5404355, 10808710, 21617420]

約数ペア:

[(1, 21617420), (2, 10808710), (4, 5404355), (5, 4323484), (10, 2161742), (11, 1965220), (20, 1080871), (22, 982610), (44, 491305), (55, 393044), (97, 222860), (110, 196522), (194, 111430), (220, 98261), (388, 55715), (485, 44572), (970, 22286), (1013, 21340), (1067, 20260), (1940, 11143), (2026, 10670), (2134, 10130), (4052, 5335), (4268, 5065)]