21638565

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{787}}^1$

素因数の和:858

約数の個数: 48

約数和(自身を含む): 41303808

約数和(自身を除く): 19665243

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 47, 65, 117, 141, 195, 235, 423, 585, 611, 705, 787, 1833, 2115, 2361, 3055, 3935, 5499, 7083, 9165, 10231, 11805, 27495, 30693, 35415, 36989, 51155, 92079, 110967, 153465, 184945, 332901, 460395, 480857, 554835, 1442571, 1664505, 2404285, 4327713, 7212855, 21638565]

約数ペア:

[(1, 21638565), (3, 7212855), (5, 4327713), (9, 2404285), (13, 1664505), (15, 1442571), (39, 554835), (45, 480857), (47, 460395), (65, 332901), (117, 184945), (141, 153465), (195, 110967), (235, 92079), (423, 51155), (585, 36989), (611, 35415), (705, 30693), (787, 27495), (1833, 11805), (2115, 10231), (2361, 9165), (3055, 7083), (3935, 5499)]