261660

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{89}}^1$

素因数の和:115

約数の個数: 72

約数和(自身を含む): 861840

約数和(自身を除く): 600180

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 49, 60, 70, 84, 89, 98, 105, 140, 147, 178, 196, 210, 245, 267, 294, 356, 420, 445, 490, 534, 588, 623, 735, 890, 980, 1068, 1246, 1335, 1470, 1780, 1869, 2492, 2670, 2940, 3115, 3738, 4361, 5340, 6230, 7476, 8722, 9345, 12460, 13083, 17444, 18690, 21805, 26166, 37380, 43610, 52332, 65415, 87220, 130830, 261660]

約数ペア:

[(1, 261660), (2, 130830), (3, 87220), (4, 65415), (5, 52332), (6, 43610), (7, 37380), (10, 26166), (12, 21805), (14, 18690), (15, 17444), (20, 13083), (21, 12460), (28, 9345), (30, 8722), (35, 7476), (42, 6230), (49, 5340), (60, 4361), (70, 3738), (84, 3115), (89, 2940), (98, 2670), (105, 2492), (140, 1869), (147, 1780), (178, 1470), (196, 1335), (210, 1246), (245, 1068), (267, 980), (294, 890), (356, 735), (420, 623), (445, 588), (490, 534)]