18939440

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{18211}}^1$

素因数の和:18237

約数の個数: 40

約数和(自身を含む): 47424048

約数和(自身を除く): 28484608

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 18211, 36422, 72844, 91055, 145688, 182110, 236743, 291376, 364220, 473486, 728440, 946972, 1183715, 1456880, 1893944, 2367430, 3787888, 4734860, 9469720, 18939440]

約数ペア:

[(1, 18939440), (2, 9469720), (4, 4734860), (5, 3787888), (8, 2367430), (10, 1893944), (13, 1456880), (16, 1183715), (20, 946972), (26, 728440), (40, 473486), (52, 364220), (65, 291376), (80, 236743), (104, 182110), (130, 145688), (208, 91055), (260, 72844), (520, 36422), (1040, 18211)]