81517240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{347}}^1\times {\mathrm{839}}^1$

素因数の和:1204

約数の個数: 64

約数和(自身を含む): 210470400

約数和(自身を除く): 128953160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 347, 694, 839, 1388, 1678, 1735, 2429, 2776, 3356, 3470, 4195, 4858, 5873, 6712, 6940, 8390, 9716, 11746, 12145, 13880, 16780, 19432, 23492, 24290, 29365, 33560, 46984, 48580, 58730, 97160, 117460, 234920, 291133, 582266, 1164532, 1455665, 2037931, 2329064, 2911330, 4075862, 5822660, 8151724, 10189655, 11645320, 16303448, 20379310, 40758620, 81517240]

約数ペア:

[(1, 81517240), (2, 40758620), (4, 20379310), (5, 16303448), (7, 11645320), (8, 10189655), (10, 8151724), (14, 5822660), (20, 4075862), (28, 2911330), (35, 2329064), (40, 2037931), (56, 1455665), (70, 1164532), (140, 582266), (280, 291133), (347, 234920), (694, 117460), (839, 97160), (1388, 58730), (1678, 48580), (1735, 46984), (2429, 33560), (2776, 29365), (3356, 24290), (3470, 23492), (4195, 19432), (4858, 16780), (5873, 13880), (6712, 12145), (6940, 11746), (8390, 9716)]