21333440

素因数分解:

$2^6\times 5^1\times {\mathrm{163}}^1\times {\mathrm{409}}^1$

素因数の和:589

約数の個数: 56

約数和(自身を含む): 51236880

約数和(自身を除く): 29903440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 163, 320, 326, 409, 652, 815, 818, 1304, 1630, 1636, 2045, 2608, 3260, 3272, 4090, 5216, 6520, 6544, 8180, 10432, 13040, 13088, 16360, 26080, 26176, 32720, 52160, 65440, 66667, 130880, 133334, 266668, 333335, 533336, 666670, 1066672, 1333340, 2133344, 2666680, 4266688, 5333360, 10666720, 21333440]

約数ペア:

[(1, 21333440), (2, 10666720), (4, 5333360), (5, 4266688), (8, 2666680), (10, 2133344), (16, 1333340), (20, 1066672), (32, 666670), (40, 533336), (64, 333335), (80, 266668), (160, 133334), (163, 130880), (320, 66667), (326, 65440), (409, 52160), (652, 32720), (815, 26176), (818, 26080), (1304, 16360), (1630, 13088), (1636, 13040), (2045, 10432), (2608, 8180), (3260, 6544), (3272, 6520), (4090, 5216)]