19908756

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{199}}^1\times {\mathrm{397}}^1$

素因数の和:613

約数の個数: 72

約数和(自身を含む): 57948800

約数和(自身を除く): 38040044

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 199, 252, 397, 398, 597, 794, 796, 1191, 1194, 1393, 1588, 1791, 2382, 2388, 2779, 2786, 3573, 3582, 4179, 4764, 5558, 5572, 7146, 7164, 8337, 8358, 11116, 12537, 14292, 16674, 16716, 25011, 25074, 33348, 50022, 50148, 79003, 100044, 158006, 237009, 316012, 474018, 553021, 711027, 948036, 1106042, 1422054, 1659063, 2212084, 2844108, 3318126, 4977189, 6636252, 9954378, 19908756]

約数ペア:

[(1, 19908756), (2, 9954378), (3, 6636252), (4, 4977189), (6, 3318126), (7, 2844108), (9, 2212084), (12, 1659063), (14, 1422054), (18, 1106042), (21, 948036), (28, 711027), (36, 553021), (42, 474018), (63, 316012), (84, 237009), (126, 158006), (199, 100044), (252, 79003), (397, 50148), (398, 50022), (597, 33348), (794, 25074), (796, 25011), (1191, 16716), (1194, 16674), (1393, 14292), (1588, 12537), (1791, 11116), (2382, 8358), (2388, 8337), (2779, 7164), (2786, 7146), (3573, 5572), (3582, 5558), (4179, 4764)]