21297860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1367}}^1$

素因数の和:1436

約数の個数: 48

約数和(自身を含む): 48263040

約数和(自身を除く): 26965180

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 76, 82, 95, 164, 190, 205, 380, 410, 779, 820, 1367, 1558, 2734, 3116, 3895, 5468, 6835, 7790, 13670, 15580, 25973, 27340, 51946, 56047, 103892, 112094, 129865, 224188, 259730, 280235, 519460, 560470, 1064893, 1120940, 2129786, 4259572, 5324465, 10648930, 21297860]

約数ペア:

[(1, 21297860), (2, 10648930), (4, 5324465), (5, 4259572), (10, 2129786), (19, 1120940), (20, 1064893), (38, 560470), (41, 519460), (76, 280235), (82, 259730), (95, 224188), (164, 129865), (190, 112094), (205, 103892), (380, 56047), (410, 51946), (779, 27340), (820, 25973), (1367, 15580), (1558, 13670), (2734, 7790), (3116, 6835), (3895, 5468)]