19639880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{179}}^1\times {\mathrm{211}}^1$

素因数の和:414

約数の個数: 64

約数和(自身を含む): 48081600

約数和(自身を除く): 28441720

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 179, 211, 260, 358, 422, 520, 716, 844, 895, 1055, 1432, 1688, 1790, 2110, 2327, 2743, 3580, 4220, 4654, 5486, 7160, 8440, 9308, 10972, 11635, 13715, 18616, 21944, 23270, 27430, 37769, 46540, 54860, 75538, 93080, 109720, 151076, 188845, 302152, 377690, 490997, 755380, 981994, 1510760, 1963988, 2454985, 3927976, 4909970, 9819940, 19639880]

約数ペア:

[(1, 19639880), (2, 9819940), (4, 4909970), (5, 3927976), (8, 2454985), (10, 1963988), (13, 1510760), (20, 981994), (26, 755380), (40, 490997), (52, 377690), (65, 302152), (104, 188845), (130, 151076), (179, 109720), (211, 93080), (260, 75538), (358, 54860), (422, 46540), (520, 37769), (716, 27430), (844, 23270), (895, 21944), (1055, 18616), (1432, 13715), (1688, 11635), (1790, 10972), (2110, 9308), (2327, 8440), (2743, 7160), (3580, 5486), (4220, 4654)]