20637405

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{53}}^1\times {\mathrm{509}}^1$

素因数の和:590

約数の個数: 48

約数和(自身を含む): 38666160

約数和(自身を除く): 18028755

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 53, 85, 153, 159, 255, 265, 477, 509, 765, 795, 901, 1527, 2385, 2545, 2703, 4505, 4581, 7635, 8109, 8653, 13515, 22905, 25959, 26977, 40545, 43265, 77877, 80931, 129795, 134885, 242793, 389385, 404655, 458609, 1213965, 1375827, 2293045, 4127481, 6879135, 20637405]

約数ペア:

[(1, 20637405), (3, 6879135), (5, 4127481), (9, 2293045), (15, 1375827), (17, 1213965), (45, 458609), (51, 404655), (53, 389385), (85, 242793), (153, 134885), (159, 129795), (255, 80931), (265, 77877), (477, 43265), (509, 40545), (765, 26977), (795, 25959), (901, 22905), (1527, 13515), (2385, 8653), (2545, 8109), (2703, 7635), (4505, 4581)]