128580260

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{19423}}^1$

素因数の和:19763

約数の個数: 24

約数和(自身を含む): 270848256

約数和(自身を除く): 142267996

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3310, 6620, 19423, 38846, 77692, 97115, 194230, 388460, 6429013, 12858026, 25716052, 32145065, 64290130, 128580260]

約数ペア:

[(1, 128580260), (2, 64290130), (4, 32145065), (5, 25716052), (10, 12858026), (20, 6429013), (331, 388460), (662, 194230), (1324, 97115), (1655, 77692), (3310, 38846), (6620, 19423)]