31423720

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{239}}^1$

素因数の和:442

約数の個数: 64

約数和(自身を含む): 75168000

約数和(自身を除く): 43744280

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 173, 190, 239, 346, 380, 478, 692, 760, 865, 956, 1195, 1384, 1730, 1912, 2390, 3287, 3460, 4541, 4780, 6574, 6920, 9082, 9560, 13148, 16435, 18164, 22705, 26296, 32870, 36328, 41347, 45410, 65740, 82694, 90820, 131480, 165388, 181640, 206735, 330776, 413470, 785593, 826940, 1571186, 1653880, 3142372, 3927965, 6284744, 7855930, 15711860, 31423720]

約数ペア:

[(1, 31423720), (2, 15711860), (4, 7855930), (5, 6284744), (8, 3927965), (10, 3142372), (19, 1653880), (20, 1571186), (38, 826940), (40, 785593), (76, 413470), (95, 330776), (152, 206735), (173, 181640), (190, 165388), (239, 131480), (346, 90820), (380, 82694), (478, 65740), (692, 45410), (760, 41347), (865, 36328), (956, 32870), (1195, 26296), (1384, 22705), (1730, 18164), (1912, 16435), (2390, 13148), (3287, 9560), (3460, 9082), (4541, 6920), (4780, 6574)]