8021420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^2\times {\mathrm{101}}^1$

素因数の和:159

約数の個数: 72

約数和(自身を含む): 19586448

約数和(自身を除く): 11565028

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 101, 110, 190, 202, 209, 220, 361, 380, 404, 418, 505, 722, 836, 1010, 1045, 1111, 1444, 1805, 1919, 2020, 2090, 2222, 3610, 3838, 3971, 4180, 4444, 5555, 7220, 7676, 7942, 9595, 11110, 15884, 19190, 19855, 21109, 22220, 36461, 38380, 39710, 42218, 72922, 79420, 84436, 105545, 145844, 182305, 211090, 364610, 401071, 422180, 729220, 802142, 1604284, 2005355, 4010710, 8021420]

約数ペア:

[(1, 8021420), (2, 4010710), (4, 2005355), (5, 1604284), (10, 802142), (11, 729220), (19, 422180), (20, 401071), (22, 364610), (38, 211090), (44, 182305), (55, 145844), (76, 105545), (95, 84436), (101, 79420), (110, 72922), (190, 42218), (202, 39710), (209, 38380), (220, 36461), (361, 22220), (380, 21109), (404, 19855), (418, 19190), (505, 15884), (722, 11110), (836, 9595), (1010, 7942), (1045, 7676), (1111, 7220), (1444, 5555), (1805, 4444), (1919, 4180), (2020, 3971), (2090, 3838), (2222, 3610)]