20981640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{53}}^1\times {\mathrm{3299}}^1$

素因数の和:3366

約数の個数: 64

約数和(自身を含む): 64152000

約数和(自身を除く): 43170360

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 53, 60, 106, 120, 159, 212, 265, 318, 424, 530, 636, 795, 1060, 1272, 1590, 2120, 3180, 3299, 6360, 6598, 9897, 13196, 16495, 19794, 26392, 32990, 39588, 49485, 65980, 79176, 98970, 131960, 174847, 197940, 349694, 395880, 524541, 699388, 874235, 1049082, 1398776, 1748470, 2098164, 2622705, 3496940, 4196328, 5245410, 6993880, 10490820, 20981640]

約数ペア:

[(1, 20981640), (2, 10490820), (3, 6993880), (4, 5245410), (5, 4196328), (6, 3496940), (8, 2622705), (10, 2098164), (12, 1748470), (15, 1398776), (20, 1049082), (24, 874235), (30, 699388), (40, 524541), (53, 395880), (60, 349694), (106, 197940), (120, 174847), (159, 131960), (212, 98970), (265, 79176), (318, 65980), (424, 49485), (530, 39588), (636, 32990), (795, 26392), (1060, 19794), (1272, 16495), (1590, 13196), (2120, 9897), (3180, 6598), (3299, 6360)]