128403940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{39877}}^1$

素因数の和:39916

約数の個数: 48

約数和(自身を含む): 321576192

約数和(自身を除く): 193172252

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 23, 28, 35, 46, 70, 92, 115, 140, 161, 230, 322, 460, 644, 805, 1610, 3220, 39877, 79754, 159508, 199385, 279139, 398770, 558278, 797540, 917171, 1116556, 1395695, 1834342, 2791390, 3668684, 4585855, 5582780, 6420197, 9171710, 12840394, 18343420, 25680788, 32100985, 64201970, 128403940]

約数ペア:

[(1, 128403940), (2, 64201970), (4, 32100985), (5, 25680788), (7, 18343420), (10, 12840394), (14, 9171710), (20, 6420197), (23, 5582780), (28, 4585855), (35, 3668684), (46, 2791390), (70, 1834342), (92, 1395695), (115, 1116556), (140, 917171), (161, 797540), (230, 558278), (322, 398770), (460, 279139), (644, 199385), (805, 159508), (1610, 79754), (3220, 39877)]