21405780

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{569}}^1$

素因数の和:614

約数の個数: 144

約数和(自身を含む): 74692800

約数和(自身を除く): 53287020

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 19, 20, 22, 30, 33, 36, 38, 44, 45, 55, 57, 60, 66, 76, 90, 95, 99, 110, 114, 132, 165, 171, 180, 190, 198, 209, 220, 228, 285, 330, 342, 380, 396, 418, 495, 569, 570, 627, 660, 684, 836, 855, 990, 1045, 1138, 1140, 1254, 1707, 1710, 1881, 1980, 2090, 2276, 2508, 2845, 3135, 3414, 3420, 3762, 4180, 5121, 5690, 6259, 6270, 6828, 7524, 8535, 9405, 10242, 10811, 11380, 12518, 12540, 17070, 18777, 18810, 20484, 21622, 25036, 25605, 31295, 32433, 34140, 37554, 37620, 43244, 51210, 54055, 56331, 62590, 64866, 75108, 93885, 97299, 102420, 108110, 112662, 118921, 125180, 129732, 162165, 187770, 194598, 216220, 225324, 237842, 281655, 324330, 356763, 375540, 389196, 475684, 486495, 563310, 594605, 648660, 713526, 972990, 1070289, 1126620, 1189210, 1427052, 1783815, 1945980, 2140578, 2378420, 3567630, 4281156, 5351445, 7135260, 10702890, 21405780]

約数ペア:

[(1, 21405780), (2, 10702890), (3, 7135260), (4, 5351445), (5, 4281156), (6, 3567630), (9, 2378420), (10, 2140578), (11, 1945980), (12, 1783815), (15, 1427052), (18, 1189210), (19, 1126620), (20, 1070289), (22, 972990), (30, 713526), (33, 648660), (36, 594605), (38, 563310), (44, 486495), (45, 475684), (55, 389196), (57, 375540), (60, 356763), (66, 324330), (76, 281655), (90, 237842), (95, 225324), (99, 216220), (110, 194598), (114, 187770), (132, 162165), (165, 129732), (171, 125180), (180, 118921), (190, 112662), (198, 108110), (209, 102420), (220, 97299), (228, 93885), (285, 75108), (330, 64866), (342, 62590), (380, 56331), (396, 54055), (418, 51210), (495, 43244), (569, 37620), (570, 37554), (627, 34140), (660, 32433), (684, 31295), (836, 25605), (855, 25036), (990, 21622), (1045, 20484), (1138, 18810), (1140, 18777), (1254, 17070), (1707, 12540), (1710, 12518), (1881, 11380), (1980, 10811), (2090, 10242), (2276, 9405), (2508, 8535), (2845, 7524), (3135, 6828), (3414, 6270), (3420, 6259), (3762, 5690), (4180, 5121)]