28743440

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:480

約数の個数: 80

約数和(自身を含む): 73923840

約数和(自身を除く): 45180400

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 89, 110, 176, 178, 220, 356, 367, 440, 445, 712, 734, 880, 890, 979, 1424, 1468, 1780, 1835, 1958, 2936, 3560, 3670, 3916, 4037, 4895, 5872, 7120, 7340, 7832, 8074, 9790, 14680, 15664, 16148, 19580, 20185, 29360, 32296, 32663, 39160, 40370, 64592, 65326, 78320, 80740, 130652, 161480, 163315, 261304, 322960, 326630, 359293, 522608, 653260, 718586, 1306520, 1437172, 1796465, 2613040, 2874344, 3592930, 5748688, 7185860, 14371720, 28743440]

約数ペア:

[(1, 28743440), (2, 14371720), (4, 7185860), (5, 5748688), (8, 3592930), (10, 2874344), (11, 2613040), (16, 1796465), (20, 1437172), (22, 1306520), (40, 718586), (44, 653260), (55, 522608), (80, 359293), (88, 326630), (89, 322960), (110, 261304), (176, 163315), (178, 161480), (220, 130652), (356, 80740), (367, 78320), (440, 65326), (445, 64592), (712, 40370), (734, 39160), (880, 32663), (890, 32296), (979, 29360), (1424, 20185), (1468, 19580), (1780, 16148), (1835, 15664), (1958, 14680), (2936, 9790), (3560, 8074), (3670, 7832), (3916, 7340), (4037, 7120), (4895, 5872)]