1388403560

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{390001}}^1$

素因数の和:390101

約数の個数: 32

約数和(自身を含む): 3159016200

約数和(自身を除く): 1770612640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 390001, 780002, 1560004, 1950005, 3120008, 3900010, 7800020, 15600040, 34710089, 69420178, 138840356, 173550445, 277680712, 347100890, 694201780, 1388403560]

約数ペア:

[(1, 1388403560), (2, 694201780), (4, 347100890), (5, 277680712), (8, 173550445), (10, 138840356), (20, 69420178), (40, 34710089), (89, 15600040), (178, 7800020), (356, 3900010), (445, 3120008), (712, 1950005), (890, 1560004), (1780, 780002), (3560, 390001)]