21151845

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1$

素因数の和:227

約数の個数: 96

約数和(自身を含む): 45601920

約数和(自身を除く): 24450075

約数列:

[1, 3, 5, 9, 11, 13, 15, 19, 33, 39, 45, 55, 57, 65, 95, 99, 117, 143, 165, 171, 173, 195, 209, 247, 285, 429, 495, 519, 585, 627, 715, 741, 855, 865, 1045, 1235, 1287, 1557, 1881, 1903, 2145, 2223, 2249, 2595, 2717, 3135, 3287, 3705, 5709, 6435, 6747, 7785, 8151, 9405, 9515, 9861, 11115, 11245, 13585, 16435, 17127, 20241, 24453, 24739, 28545, 29583, 33735, 36157, 40755, 42731, 49305, 74217, 85635, 101205, 108471, 122265, 123695, 128193, 147915, 180785, 213655, 222651, 325413, 371085, 384579, 470041, 542355, 640965, 1113255, 1410123, 1627065, 1922895, 2350205, 4230369, 7050615, 21151845]

約数ペア:

[(1, 21151845), (3, 7050615), (5, 4230369), (9, 2350205), (11, 1922895), (13, 1627065), (15, 1410123), (19, 1113255), (33, 640965), (39, 542355), (45, 470041), (55, 384579), (57, 371085), (65, 325413), (95, 222651), (99, 213655), (117, 180785), (143, 147915), (165, 128193), (171, 123695), (173, 122265), (195, 108471), (209, 101205), (247, 85635), (285, 74217), (429, 49305), (495, 42731), (519, 40755), (585, 36157), (627, 33735), (715, 29583), (741, 28545), (855, 24739), (865, 24453), (1045, 20241), (1235, 17127), (1287, 16435), (1557, 13585), (1881, 11245), (1903, 11115), (2145, 9861), (2223, 9515), (2249, 9405), (2595, 8151), (2717, 7785), (3135, 6747), (3287, 6435), (3705, 5709)]