21681618

素因数分解:

$2^1\times 3^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2543}}^1$

素因数の和:2591

約数の個数: 48

約数和(自身を含む): 52202880

約数和(自身を除く): 30521262

約数列:

[1, 2, 3, 6, 7, 14, 21, 29, 42, 49, 58, 87, 98, 147, 174, 203, 294, 406, 609, 1218, 1421, 2543, 2842, 4263, 5086, 7629, 8526, 15258, 17801, 35602, 53403, 73747, 106806, 124607, 147494, 221241, 249214, 373821, 442482, 516229, 747642, 1032458, 1548687, 3097374, 3613603, 7227206, 10840809, 21681618]

約数ペア:

[(1, 21681618), (2, 10840809), (3, 7227206), (6, 3613603), (7, 3097374), (14, 1548687), (21, 1032458), (29, 747642), (42, 516229), (49, 442482), (58, 373821), (87, 249214), (98, 221241), (147, 147494), (174, 124607), (203, 106806), (294, 73747), (406, 53403), (609, 35602), (1218, 17801), (1421, 15258), (2543, 8526), (2842, 7629), (4263, 5086)]