21471723

素因数分解:

$3^5\times 7^1\times {\mathrm{13}}^1\times {\mathrm{971}}^1$

素因数の和:1006

約数の個数: 48

約数和(自身を含む): 39626496

約数和(自身を除く): 18154773

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 81, 91, 117, 189, 243, 273, 351, 567, 819, 971, 1053, 1701, 2457, 2913, 3159, 6797, 7371, 8739, 12623, 20391, 22113, 26217, 37869, 61173, 78651, 88361, 113607, 183519, 235953, 265083, 340821, 550557, 795249, 1022463, 1651671, 2385747, 3067389, 7157241, 21471723]

約数ペア:

[(1, 21471723), (3, 7157241), (7, 3067389), (9, 2385747), (13, 1651671), (21, 1022463), (27, 795249), (39, 550557), (63, 340821), (81, 265083), (91, 235953), (117, 183519), (189, 113607), (243, 88361), (273, 78651), (351, 61173), (567, 37869), (819, 26217), (971, 22113), (1053, 20391), (1701, 12623), (2457, 8739), (2913, 7371), (3159, 6797)]