64909840

素因数分解:

$2^4\times 5^1\times {\mathrm{37}}^1\times {\mathrm{21929}}^1$

素因数の和:21979

約数の個数: 40

約数和(自身を含む): 155001240

約数和(自身を除く): 90091400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 37, 40, 74, 80, 148, 185, 296, 370, 592, 740, 1480, 2960, 21929, 43858, 87716, 109645, 175432, 219290, 350864, 438580, 811373, 877160, 1622746, 1754320, 3245492, 4056865, 6490984, 8113730, 12981968, 16227460, 32454920, 64909840]

約数ペア:

[(1, 64909840), (2, 32454920), (4, 16227460), (5, 12981968), (8, 8113730), (10, 6490984), (16, 4056865), (20, 3245492), (37, 1754320), (40, 1622746), (74, 877160), (80, 811373), (148, 438580), (185, 350864), (296, 219290), (370, 175432), (592, 109645), (740, 87716), (1480, 43858), (2960, 21929)]