19975780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{101}}^1$

素因数の和:181

約数の個数: 96

約数和(自身を含む): 49351680

約数和(自身を除く): 29375900

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 29, 31, 44, 55, 58, 62, 101, 110, 116, 124, 145, 155, 202, 220, 290, 310, 319, 341, 404, 505, 580, 620, 638, 682, 899, 1010, 1111, 1276, 1364, 1595, 1705, 1798, 2020, 2222, 2929, 3131, 3190, 3410, 3596, 4444, 4495, 5555, 5858, 6262, 6380, 6820, 8990, 9889, 11110, 11716, 12524, 14645, 15655, 17980, 19778, 22220, 29290, 31310, 32219, 34441, 39556, 49445, 58580, 62620, 64438, 68882, 90799, 98890, 128876, 137764, 161095, 172205, 181598, 197780, 322190, 344410, 363196, 453995, 644380, 688820, 907990, 998789, 1815980, 1997578, 3995156, 4993945, 9987890, 19975780]

約数ペア:

[(1, 19975780), (2, 9987890), (4, 4993945), (5, 3995156), (10, 1997578), (11, 1815980), (20, 998789), (22, 907990), (29, 688820), (31, 644380), (44, 453995), (55, 363196), (58, 344410), (62, 322190), (101, 197780), (110, 181598), (116, 172205), (124, 161095), (145, 137764), (155, 128876), (202, 98890), (220, 90799), (290, 68882), (310, 64438), (319, 62620), (341, 58580), (404, 49445), (505, 39556), (580, 34441), (620, 32219), (638, 31310), (682, 29290), (899, 22220), (1010, 19778), (1111, 17980), (1276, 15655), (1364, 14645), (1595, 12524), (1705, 11716), (1798, 11110), (2020, 9889), (2222, 8990), (2929, 6820), (3131, 6380), (3190, 6262), (3410, 5858), (3596, 5555), (4444, 4495)]