21643755

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^2\times {\mathrm{571}}^1$

素因数の和:624

約数の個数: 48

約数和(自身を含む): 41842944

約数和(自身を除く): 20199189

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 361, 399, 571, 665, 1083, 1713, 1805, 1995, 2527, 2855, 3997, 5415, 7581, 8565, 10849, 11991, 12635, 19985, 32547, 37905, 54245, 59955, 75943, 162735, 206131, 227829, 379715, 618393, 1030655, 1139145, 1442917, 3091965, 4328751, 7214585, 21643755]

約数ペア:

[(1, 21643755), (3, 7214585), (5, 4328751), (7, 3091965), (15, 1442917), (19, 1139145), (21, 1030655), (35, 618393), (57, 379715), (95, 227829), (105, 206131), (133, 162735), (285, 75943), (361, 59955), (399, 54245), (571, 37905), (665, 32547), (1083, 19985), (1713, 12635), (1805, 11991), (1995, 10849), (2527, 8565), (2855, 7581), (3997, 5415)]