20891970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{449}}^1$

素因数の和:520

約数の個数: 96

約数和(自身を含む): 60652800

約数和(自身を除く): 39760830

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 47, 55, 66, 90, 94, 99, 110, 141, 165, 198, 235, 282, 330, 423, 449, 470, 495, 517, 705, 846, 898, 990, 1034, 1347, 1410, 1551, 2115, 2245, 2585, 2694, 3102, 4041, 4230, 4490, 4653, 4939, 5170, 6735, 7755, 8082, 9306, 9878, 13470, 14817, 15510, 20205, 21103, 23265, 24695, 29634, 40410, 42206, 44451, 46530, 49390, 63309, 74085, 88902, 105515, 126618, 148170, 189927, 211030, 222255, 232133, 316545, 379854, 444510, 464266, 633090, 696399, 949635, 1160665, 1392798, 1899270, 2089197, 2321330, 3481995, 4178394, 6963990, 10445985, 20891970]

約数ペア:

[(1, 20891970), (2, 10445985), (3, 6963990), (5, 4178394), (6, 3481995), (9, 2321330), (10, 2089197), (11, 1899270), (15, 1392798), (18, 1160665), (22, 949635), (30, 696399), (33, 633090), (45, 464266), (47, 444510), (55, 379854), (66, 316545), (90, 232133), (94, 222255), (99, 211030), (110, 189927), (141, 148170), (165, 126618), (198, 105515), (235, 88902), (282, 74085), (330, 63309), (423, 49390), (449, 46530), (470, 44451), (495, 42206), (517, 40410), (705, 29634), (846, 24695), (898, 23265), (990, 21103), (1034, 20205), (1347, 15510), (1410, 14817), (1551, 13470), (2115, 9878), (2245, 9306), (2585, 8082), (2694, 7755), (3102, 6735), (4041, 5170), (4230, 4939), (4490, 4653)]