21151978

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{137}}^1\times {\mathrm{239}}^1$

素因数の和:414

約数の個数: 32

約数和(自身を含む): 35769600

約数和(自身を除く): 14617622

約数列:

[1, 2, 17, 19, 34, 38, 137, 239, 274, 323, 478, 646, 2329, 2603, 4063, 4541, 4658, 5206, 8126, 9082, 32743, 44251, 65486, 77197, 88502, 154394, 556631, 622117, 1113262, 1244234, 10575989, 21151978]

約数ペア:

[(1, 21151978), (2, 10575989), (17, 1244234), (19, 1113262), (34, 622117), (38, 556631), (137, 154394), (239, 88502), (274, 77197), (323, 65486), (478, 44251), (646, 32743), (2329, 9082), (2603, 8126), (4063, 5206), (4541, 4658)]