16781240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{821}}^1$

素因数の和:912

約数の個数: 64

約数和(自身を含む): 43796160

約数和(自身を除く): 27014920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 73, 140, 146, 280, 292, 365, 511, 584, 730, 821, 1022, 1460, 1642, 2044, 2555, 2920, 3284, 4088, 4105, 5110, 5747, 6568, 8210, 10220, 11494, 16420, 20440, 22988, 28735, 32840, 45976, 57470, 59933, 114940, 119866, 229880, 239732, 299665, 419531, 479464, 599330, 839062, 1198660, 1678124, 2097655, 2397320, 3356248, 4195310, 8390620, 16781240]

約数ペア:

[(1, 16781240), (2, 8390620), (4, 4195310), (5, 3356248), (7, 2397320), (8, 2097655), (10, 1678124), (14, 1198660), (20, 839062), (28, 599330), (35, 479464), (40, 419531), (56, 299665), (70, 239732), (73, 229880), (140, 119866), (146, 114940), (280, 59933), (292, 57470), (365, 45976), (511, 32840), (584, 28735), (730, 22988), (821, 20440), (1022, 16420), (1460, 11494), (1642, 10220), (2044, 8210), (2555, 6568), (2920, 5747), (3284, 5110), (4088, 4105)]