20531212

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1$

素因数の和:238

約数の個数: 48

約数和(自身を含む): 40303872

約数和(自身を除く): 19772660

約数列:

[1, 2, 4, 13, 26, 52, 67, 71, 83, 134, 142, 166, 268, 284, 332, 871, 923, 1079, 1742, 1846, 2158, 3484, 3692, 4316, 4757, 5561, 5893, 9514, 11122, 11786, 19028, 22244, 23572, 61841, 72293, 76609, 123682, 144586, 153218, 247364, 289172, 306436, 394831, 789662, 1579324, 5132803, 10265606, 20531212]

約数ペア:

[(1, 20531212), (2, 10265606), (4, 5132803), (13, 1579324), (26, 789662), (52, 394831), (67, 306436), (71, 289172), (83, 247364), (134, 153218), (142, 144586), (166, 123682), (268, 76609), (284, 72293), (332, 61841), (871, 23572), (923, 22244), (1079, 19028), (1742, 11786), (1846, 11122), (2158, 9514), (3484, 5893), (3692, 5561), (4316, 4757)]