639888920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{20483}}^1$

素因数の和:20576

約数の個数: 64

約数和(自身を含む): 1592835840

約数和(自身を除く): 952946920

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 71, 88, 110, 142, 220, 284, 355, 440, 568, 710, 781, 1420, 1562, 2840, 3124, 3905, 6248, 7810, 15620, 20483, 31240, 40966, 81932, 102415, 163864, 204830, 225313, 409660, 450626, 819320, 901252, 1126565, 1454293, 1802504, 2253130, 2908586, 4506260, 5817172, 7271465, 9012520, 11634344, 14542930, 15997223, 29085860, 31994446, 58171720, 63988892, 79986115, 127977784, 159972230, 319944460, 639888920]

約数ペア:

[(1, 639888920), (2, 319944460), (4, 159972230), (5, 127977784), (8, 79986115), (10, 63988892), (11, 58171720), (20, 31994446), (22, 29085860), (40, 15997223), (44, 14542930), (55, 11634344), (71, 9012520), (88, 7271465), (110, 5817172), (142, 4506260), (220, 2908586), (284, 2253130), (355, 1802504), (440, 1454293), (568, 1126565), (710, 901252), (781, 819320), (1420, 450626), (1562, 409660), (2840, 225313), (3124, 204830), (3905, 163864), (6248, 102415), (7810, 81932), (15620, 40966), (20483, 31240)]