20416941

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{173}}^1$

素因数の和:263

約数の個数: 40

約数和(自身を含む): 32338944

約数和(自身を除く): 11922003

約数列:

[1, 3, 9, 27, 31, 47, 81, 93, 141, 173, 279, 423, 519, 837, 1269, 1457, 1557, 2511, 3807, 4371, 4671, 5363, 8131, 13113, 14013, 16089, 24393, 39339, 48267, 73179, 118017, 144801, 219537, 252061, 434403, 658611, 756183, 2268549, 6805647, 20416941]

約数ペア:

[(1, 20416941), (3, 6805647), (9, 2268549), (27, 756183), (31, 658611), (47, 434403), (81, 252061), (93, 219537), (141, 144801), (173, 118017), (279, 73179), (423, 48267), (519, 39339), (837, 24393), (1269, 16089), (1457, 14013), (1557, 13113), (2511, 8131), (3807, 5363), (4371, 4671)]