21538356

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{89}}^1$

素因数の和:213

約数の個数: 96

約数和(自身を含む): 60318720

約数和(自身を除く): 38780364

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 43, 67, 84, 86, 89, 129, 134, 172, 178, 201, 258, 267, 268, 301, 356, 402, 469, 516, 534, 602, 623, 804, 903, 938, 1068, 1204, 1246, 1407, 1806, 1869, 1876, 2492, 2814, 2881, 3612, 3738, 3827, 5628, 5762, 5963, 7476, 7654, 8643, 11481, 11524, 11926, 15308, 17286, 17889, 20167, 22962, 23852, 26789, 34572, 35778, 40334, 41741, 45924, 53578, 60501, 71556, 80367, 80668, 83482, 107156, 121002, 125223, 160734, 166964, 242004, 250446, 256409, 321468, 500892, 512818, 769227, 1025636, 1538454, 1794863, 3076908, 3589726, 5384589, 7179452, 10769178, 21538356]

約数ペア:

[(1, 21538356), (2, 10769178), (3, 7179452), (4, 5384589), (6, 3589726), (7, 3076908), (12, 1794863), (14, 1538454), (21, 1025636), (28, 769227), (42, 512818), (43, 500892), (67, 321468), (84, 256409), (86, 250446), (89, 242004), (129, 166964), (134, 160734), (172, 125223), (178, 121002), (201, 107156), (258, 83482), (267, 80668), (268, 80367), (301, 71556), (356, 60501), (402, 53578), (469, 45924), (516, 41741), (534, 40334), (602, 35778), (623, 34572), (804, 26789), (903, 23852), (938, 22962), (1068, 20167), (1204, 17889), (1246, 17286), (1407, 15308), (1806, 11926), (1869, 11524), (1876, 11481), (2492, 8643), (2814, 7654), (2881, 7476), (3612, 5963), (3738, 5762), (3827, 5628)]