19405880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{557}}^1$

素因数の和:648

約数の個数: 64

約数和(自身を含む): 47809440

約数和(自身を除く): 28403560

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 67, 104, 130, 134, 260, 268, 335, 520, 536, 557, 670, 871, 1114, 1340, 1742, 2228, 2680, 2785, 3484, 4355, 4456, 5570, 6968, 7241, 8710, 11140, 14482, 17420, 22280, 28964, 34840, 36205, 37319, 57928, 72410, 74638, 144820, 149276, 186595, 289640, 298552, 373190, 485147, 746380, 970294, 1492760, 1940588, 2425735, 3881176, 4851470, 9702940, 19405880]

約数ペア:

[(1, 19405880), (2, 9702940), (4, 4851470), (5, 3881176), (8, 2425735), (10, 1940588), (13, 1492760), (20, 970294), (26, 746380), (40, 485147), (52, 373190), (65, 298552), (67, 289640), (104, 186595), (130, 149276), (134, 144820), (260, 74638), (268, 72410), (335, 57928), (520, 37319), (536, 36205), (557, 34840), (670, 28964), (871, 22280), (1114, 17420), (1340, 14482), (1742, 11140), (2228, 8710), (2680, 7241), (2785, 6968), (3484, 5570), (4355, 4456)]