20179760

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1$

素因数の和:226

約数の個数: 80

約数和(自身を含む): 49520640

約数和(自身を除く): 29340880

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 79, 80, 103, 124, 155, 158, 206, 248, 310, 316, 395, 412, 496, 515, 620, 632, 790, 824, 1030, 1240, 1264, 1580, 1648, 2060, 2449, 2480, 3160, 3193, 4120, 4898, 6320, 6386, 8137, 8240, 9796, 12245, 12772, 15965, 16274, 19592, 24490, 25544, 31930, 32548, 39184, 40685, 48980, 51088, 63860, 65096, 81370, 97960, 127720, 130192, 162740, 195920, 252247, 255440, 325480, 504494, 650960, 1008988, 1261235, 2017976, 2522470, 4035952, 5044940, 10089880, 20179760]

約数ペア:

[(1, 20179760), (2, 10089880), (4, 5044940), (5, 4035952), (8, 2522470), (10, 2017976), (16, 1261235), (20, 1008988), (31, 650960), (40, 504494), (62, 325480), (79, 255440), (80, 252247), (103, 195920), (124, 162740), (155, 130192), (158, 127720), (206, 97960), (248, 81370), (310, 65096), (316, 63860), (395, 51088), (412, 48980), (496, 40685), (515, 39184), (620, 32548), (632, 31930), (790, 25544), (824, 24490), (1030, 19592), (1240, 16274), (1264, 15965), (1580, 12772), (1648, 12245), (2060, 9796), (2449, 8240), (2480, 8137), (3160, 6386), (3193, 6320), (4120, 4898)]