20424040

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{181}}^1$

素因数の和:243

約数の個数: 128

約数和(自身を含む): 58705920

約数和(自身を除く): 38281880

約数列:

[1, 2, 4, 5, 7, 8, 10, 13, 14, 20, 26, 28, 31, 35, 40, 52, 56, 62, 65, 70, 91, 104, 124, 130, 140, 155, 181, 182, 217, 248, 260, 280, 310, 362, 364, 403, 434, 455, 520, 620, 724, 728, 806, 868, 905, 910, 1085, 1240, 1267, 1448, 1612, 1736, 1810, 1820, 2015, 2170, 2353, 2534, 2821, 3224, 3620, 3640, 4030, 4340, 4706, 5068, 5611, 5642, 6335, 7240, 8060, 8680, 9412, 10136, 11222, 11284, 11765, 12670, 14105, 16120, 16471, 18824, 22444, 22568, 23530, 25340, 28055, 28210, 32942, 39277, 44888, 47060, 50680, 56110, 56420, 65884, 72943, 78554, 82355, 94120, 112220, 112840, 131768, 145886, 157108, 164710, 196385, 224440, 291772, 314216, 329420, 364715, 392770, 510601, 583544, 658840, 729430, 785540, 1021202, 1458860, 1571080, 2042404, 2553005, 2917720, 4084808, 5106010, 10212020, 20424040]

約数ペア:

[(1, 20424040), (2, 10212020), (4, 5106010), (5, 4084808), (7, 2917720), (8, 2553005), (10, 2042404), (13, 1571080), (14, 1458860), (20, 1021202), (26, 785540), (28, 729430), (31, 658840), (35, 583544), (40, 510601), (52, 392770), (56, 364715), (62, 329420), (65, 314216), (70, 291772), (91, 224440), (104, 196385), (124, 164710), (130, 157108), (140, 145886), (155, 131768), (181, 112840), (182, 112220), (217, 94120), (248, 82355), (260, 78554), (280, 72943), (310, 65884), (362, 56420), (364, 56110), (403, 50680), (434, 47060), (455, 44888), (520, 39277), (620, 32942), (724, 28210), (728, 28055), (806, 25340), (868, 23530), (905, 22568), (910, 22444), (1085, 18824), (1240, 16471), (1267, 16120), (1448, 14105), (1612, 12670), (1736, 11765), (1810, 11284), (1820, 11222), (2015, 10136), (2170, 9412), (2353, 8680), (2534, 8060), (2821, 7240), (3224, 6335), (3620, 5642), (3640, 5611), (4030, 5068), (4340, 4706)]