21550620

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{3947}}^1$

素因数の和:3979

約数の個数: 96

約数和(自身を含む): 74285568

約数和(自身を除く): 52734948

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 13, 14, 15, 20, 21, 26, 28, 30, 35, 39, 42, 52, 60, 65, 70, 78, 84, 91, 105, 130, 140, 156, 182, 195, 210, 260, 273, 364, 390, 420, 455, 546, 780, 910, 1092, 1365, 1820, 2730, 3947, 5460, 7894, 11841, 15788, 19735, 23682, 27629, 39470, 47364, 51311, 55258, 59205, 78940, 82887, 102622, 110516, 118410, 138145, 153933, 165774, 205244, 236820, 256555, 276290, 307866, 331548, 359177, 414435, 513110, 552580, 615732, 718354, 769665, 828870, 1026220, 1077531, 1436708, 1539330, 1657740, 1795885, 2155062, 3078660, 3591770, 4310124, 5387655, 7183540, 10775310, 21550620]

約数ペア:

[(1, 21550620), (2, 10775310), (3, 7183540), (4, 5387655), (5, 4310124), (6, 3591770), (7, 3078660), (10, 2155062), (12, 1795885), (13, 1657740), (14, 1539330), (15, 1436708), (20, 1077531), (21, 1026220), (26, 828870), (28, 769665), (30, 718354), (35, 615732), (39, 552580), (42, 513110), (52, 414435), (60, 359177), (65, 331548), (70, 307866), (78, 276290), (84, 256555), (91, 236820), (105, 205244), (130, 165774), (140, 153933), (156, 138145), (182, 118410), (195, 110516), (210, 102622), (260, 82887), (273, 78940), (364, 59205), (390, 55258), (420, 51311), (455, 47364), (546, 39470), (780, 27629), (910, 23682), (1092, 19735), (1365, 15788), (1820, 11841), (2730, 7894), (3947, 5460)]