21861560

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{163}}^1\times {\mathrm{479}}^1$

素因数の和:660

約数の個数: 64

約数和(自身を含む): 56678400

約数和(自身を除く): 34816840

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 163, 280, 326, 479, 652, 815, 958, 1141, 1304, 1630, 1916, 2282, 2395, 3260, 3353, 3832, 4564, 4790, 5705, 6520, 6706, 9128, 9580, 11410, 13412, 16765, 19160, 22820, 26824, 33530, 45640, 67060, 78077, 134120, 156154, 312308, 390385, 546539, 624616, 780770, 1093078, 1561540, 2186156, 2732695, 3123080, 4372312, 5465390, 10930780, 21861560]

約数ペア:

[(1, 21861560), (2, 10930780), (4, 5465390), (5, 4372312), (7, 3123080), (8, 2732695), (10, 2186156), (14, 1561540), (20, 1093078), (28, 780770), (35, 624616), (40, 546539), (56, 390385), (70, 312308), (140, 156154), (163, 134120), (280, 78077), (326, 67060), (479, 45640), (652, 33530), (815, 26824), (958, 22820), (1141, 19160), (1304, 16765), (1630, 13412), (1916, 11410), (2282, 9580), (2395, 9128), (3260, 6706), (3353, 6520), (3832, 5705), (4564, 4790)]