31378880

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{397}}^1$

素因数の和:446

約数の個数: 112

約数和(自身を含む): 84917280

約数和(自身を除く): 53538400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 19, 20, 26, 32, 38, 40, 52, 64, 65, 76, 80, 95, 104, 130, 152, 160, 190, 208, 247, 260, 304, 320, 380, 397, 416, 494, 520, 608, 760, 794, 832, 988, 1040, 1216, 1235, 1520, 1588, 1976, 1985, 2080, 2470, 3040, 3176, 3952, 3970, 4160, 4940, 5161, 6080, 6352, 7543, 7904, 7940, 9880, 10322, 12704, 15086, 15808, 15880, 19760, 20644, 25408, 25805, 30172, 31760, 37715, 39520, 41288, 51610, 60344, 63520, 75430, 79040, 82576, 98059, 103220, 120688, 127040, 150860, 165152, 196118, 206440, 241376, 301720, 330304, 392236, 412880, 482752, 490295, 603440, 784472, 825760, 980590, 1206880, 1568944, 1651520, 1961180, 2413760, 3137888, 3922360, 6275776, 7844720, 15689440, 31378880]

約数ペア:

[(1, 31378880), (2, 15689440), (4, 7844720), (5, 6275776), (8, 3922360), (10, 3137888), (13, 2413760), (16, 1961180), (19, 1651520), (20, 1568944), (26, 1206880), (32, 980590), (38, 825760), (40, 784472), (52, 603440), (64, 490295), (65, 482752), (76, 412880), (80, 392236), (95, 330304), (104, 301720), (130, 241376), (152, 206440), (160, 196118), (190, 165152), (208, 150860), (247, 127040), (260, 120688), (304, 103220), (320, 98059), (380, 82576), (397, 79040), (416, 75430), (494, 63520), (520, 60344), (608, 51610), (760, 41288), (794, 39520), (832, 37715), (988, 31760), (1040, 30172), (1216, 25805), (1235, 25408), (1520, 20644), (1588, 19760), (1976, 15880), (1985, 15808), (2080, 15086), (2470, 12704), (3040, 10322), (3176, 9880), (3952, 7940), (3970, 7904), (4160, 7543), (4940, 6352), (5161, 6080)]