1640579720

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{35449}}^1$

素因数の和:35562

約数の個数: 64

約数和(自身を含む): 4020030000

約数和(自身を除く): 2379450280

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 89, 104, 130, 178, 260, 356, 445, 520, 712, 890, 1157, 1780, 2314, 3560, 4628, 5785, 9256, 11570, 23140, 35449, 46280, 70898, 141796, 177245, 283592, 354490, 460837, 708980, 921674, 1417960, 1843348, 2304185, 3154961, 3686696, 4608370, 6309922, 9216740, 12619844, 15774805, 18433480, 25239688, 31549610, 41014493, 63099220, 82028986, 126198440, 164057972, 205072465, 328115944, 410144930, 820289860, 1640579720]

約数ペア:

[(1, 1640579720), (2, 820289860), (4, 410144930), (5, 328115944), (8, 205072465), (10, 164057972), (13, 126198440), (20, 82028986), (26, 63099220), (40, 41014493), (52, 31549610), (65, 25239688), (89, 18433480), (104, 15774805), (130, 12619844), (178, 9216740), (260, 6309922), (356, 4608370), (445, 3686696), (520, 3154961), (712, 2304185), (890, 1843348), (1157, 1417960), (1780, 921674), (2314, 708980), (3560, 460837), (4628, 354490), (5785, 283592), (9256, 177245), (11570, 141796), (23140, 70898), (35449, 46280)]