21578220

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{313}}^1\times {\mathrm{383}}^1$

素因数の和:711

約数の個数: 72

約数和(自身を含む): 65834496

約数和(自身を除く): 44256276

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 313, 383, 626, 766, 939, 1149, 1252, 1532, 1565, 1878, 1915, 2298, 2817, 3130, 3447, 3756, 3830, 4596, 4695, 5634, 5745, 6260, 6894, 7660, 9390, 11268, 11490, 13788, 14085, 17235, 18780, 22980, 28170, 34470, 56340, 68940, 119879, 239758, 359637, 479516, 599395, 719274, 1078911, 1198790, 1438548, 1798185, 2157822, 2397580, 3596370, 4315644, 5394555, 7192740, 10789110, 21578220]

約数ペア:

[(1, 21578220), (2, 10789110), (3, 7192740), (4, 5394555), (5, 4315644), (6, 3596370), (9, 2397580), (10, 2157822), (12, 1798185), (15, 1438548), (18, 1198790), (20, 1078911), (30, 719274), (36, 599395), (45, 479516), (60, 359637), (90, 239758), (180, 119879), (313, 68940), (383, 56340), (626, 34470), (766, 28170), (939, 22980), (1149, 18780), (1252, 17235), (1532, 14085), (1565, 13788), (1878, 11490), (1915, 11268), (2298, 9390), (2817, 7660), (3130, 6894), (3447, 6260), (3756, 5745), (3830, 5634), (4596, 4695)]