128438720

素因数分解:

$2^6\times 5^1\times {\mathrm{401371}}^1$

素因数の和:401388

約数の個数: 28

約数和(自身を含む): 305845464

約数和(自身を除く): 177406744

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 401371, 802742, 1605484, 2006855, 3210968, 4013710, 6421936, 8027420, 12843872, 16054840, 25687744, 32109680, 64219360, 128438720]

約数ペア:

[(1, 128438720), (2, 64219360), (4, 32109680), (5, 25687744), (8, 16054840), (10, 12843872), (16, 8027420), (20, 6421936), (32, 4013710), (40, 3210968), (64, 2006855), (80, 1605484), (160, 802742), (320, 401371)]