398439760

素因数分解:

$2^4\times 5^1\times {\mathrm{173}}^1\times {\mathrm{28789}}^1$

素因数の和:28975

約数の個数: 40

約数和(自身を含む): 931759560

約数和(自身を除く): 533319800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 173, 346, 692, 865, 1384, 1730, 2768, 3460, 6920, 13840, 28789, 57578, 115156, 143945, 230312, 287890, 460624, 575780, 1151560, 2303120, 4980497, 9960994, 19921988, 24902485, 39843976, 49804970, 79687952, 99609940, 199219880, 398439760]

約数ペア:

[(1, 398439760), (2, 199219880), (4, 99609940), (5, 79687952), (8, 49804970), (10, 39843976), (16, 24902485), (20, 19921988), (40, 9960994), (80, 4980497), (173, 2303120), (346, 1151560), (692, 575780), (865, 460624), (1384, 287890), (1730, 230312), (2768, 143945), (3460, 115156), (6920, 57578), (13840, 28789)]