87171940

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{48973}}^1$

素因数の和:49071

約数の個数: 24

約数和(自身を含む): 185121720

約数和(自身を除く): 97949780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 48973, 97946, 195892, 244865, 489730, 979460, 4358597, 8717194, 17434388, 21792985, 43585970, 87171940]

約数ペア:

[(1, 87171940), (2, 43585970), (4, 21792985), (5, 17434388), (10, 8717194), (20, 4358597), (89, 979460), (178, 489730), (356, 244865), (445, 195892), (890, 97946), (1780, 48973)]