128977720

素因数分解:

$2^3\times 5^1\times {\mathrm{683}}^1\times {\mathrm{4721}}^1$

素因数の和:5415

約数の個数: 32

約数和(自身を含む): 290686320

約数和(自身を除く): 161708600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 683, 1366, 2732, 3415, 4721, 5464, 6830, 9442, 13660, 18884, 23605, 27320, 37768, 47210, 94420, 188840, 3224443, 6448886, 12897772, 16122215, 25795544, 32244430, 64488860, 128977720]

約数ペア:

[(1, 128977720), (2, 64488860), (4, 32244430), (5, 25795544), (8, 16122215), (10, 12897772), (20, 6448886), (40, 3224443), (683, 188840), (1366, 94420), (2732, 47210), (3415, 37768), (4721, 27320), (5464, 23605), (6830, 18884), (9442, 13660)]