21119140

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{251}}^1\times {\mathrm{601}}^1$

素因数の和:868

約数の個数: 48

約数和(自身を含む): 50972544

約数和(自身を除く): 29853404

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 251, 502, 601, 1004, 1202, 1255, 1757, 2404, 2510, 3005, 3514, 4207, 5020, 6010, 7028, 8414, 8785, 12020, 16828, 17570, 21035, 35140, 42070, 84140, 150851, 301702, 603404, 754255, 1055957, 1508510, 2111914, 3017020, 4223828, 5279785, 10559570, 21119140]

約数ペア:

[(1, 21119140), (2, 10559570), (4, 5279785), (5, 4223828), (7, 3017020), (10, 2111914), (14, 1508510), (20, 1055957), (28, 754255), (35, 603404), (70, 301702), (140, 150851), (251, 84140), (502, 42070), (601, 35140), (1004, 21035), (1202, 17570), (1255, 16828), (1757, 12020), (2404, 8785), (2510, 8414), (3005, 7028), (3514, 6010), (4207, 5020)]