20488520

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{41}}^1$

素因数の和:127

約数の個数: 96

約数和(自身を含む): 52549560

約数和(自身を除く): 32061040

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 41, 52, 62, 65, 82, 104, 124, 130, 155, 164, 205, 248, 260, 310, 328, 403, 410, 520, 533, 620, 806, 820, 961, 1066, 1240, 1271, 1612, 1640, 1922, 2015, 2132, 2542, 2665, 3224, 3844, 4030, 4264, 4805, 5084, 5330, 6355, 7688, 8060, 9610, 10168, 10660, 12493, 12710, 16120, 16523, 19220, 21320, 24986, 25420, 33046, 38440, 39401, 49972, 50840, 62465, 66092, 78802, 82615, 99944, 124930, 132184, 157604, 165230, 197005, 249860, 315208, 330460, 394010, 499720, 512213, 660920, 788020, 1024426, 1576040, 2048852, 2561065, 4097704, 5122130, 10244260, 20488520]

約数ペア:

[(1, 20488520), (2, 10244260), (4, 5122130), (5, 4097704), (8, 2561065), (10, 2048852), (13, 1576040), (20, 1024426), (26, 788020), (31, 660920), (40, 512213), (41, 499720), (52, 394010), (62, 330460), (65, 315208), (82, 249860), (104, 197005), (124, 165230), (130, 157604), (155, 132184), (164, 124930), (205, 99944), (248, 82615), (260, 78802), (310, 66092), (328, 62465), (403, 50840), (410, 49972), (520, 39401), (533, 38440), (620, 33046), (806, 25420), (820, 24986), (961, 21320), (1066, 19220), (1240, 16523), (1271, 16120), (1612, 12710), (1640, 12493), (1922, 10660), (2015, 10168), (2132, 9610), (2542, 8060), (2665, 7688), (3224, 6355), (3844, 5330), (4030, 5084), (4264, 4805)]