31389440

素因数分解:

$2^8\times 5^1\times {\mathrm{137}}^1\times {\mathrm{179}}^1$

素因数の和:337

約数の個数: 72

約数和(自身を含む): 76159440

約数和(自身を除く): 44770000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 137, 160, 179, 256, 274, 320, 358, 548, 640, 685, 716, 895, 1096, 1280, 1370, 1432, 1790, 2192, 2740, 2864, 3580, 4384, 5480, 5728, 7160, 8768, 10960, 11456, 14320, 17536, 21920, 22912, 24523, 28640, 35072, 43840, 45824, 49046, 57280, 87680, 98092, 114560, 122615, 175360, 196184, 229120, 245230, 392368, 490460, 784736, 980920, 1569472, 1961840, 3138944, 3923680, 6277888, 7847360, 15694720, 31389440]

約数ペア:

[(1, 31389440), (2, 15694720), (4, 7847360), (5, 6277888), (8, 3923680), (10, 3138944), (16, 1961840), (20, 1569472), (32, 980920), (40, 784736), (64, 490460), (80, 392368), (128, 245230), (137, 229120), (160, 196184), (179, 175360), (256, 122615), (274, 114560), (320, 98092), (358, 87680), (548, 57280), (640, 49046), (685, 45824), (716, 43840), (895, 35072), (1096, 28640), (1280, 24523), (1370, 22912), (1432, 21920), (1790, 17536), (2192, 14320), (2740, 11456), (2864, 10960), (3580, 8768), (4384, 7160), (5480, 5728)]