18947440

素因数分解:

$2^4\times 5^1\times {\mathrm{29}}^1\times {\mathrm{8167}}^1$

素因数の和:8209

約数の個数: 40

約数和(自身を含む): 45577440

約数和(自身を除く): 26630000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 29, 40, 58, 80, 116, 145, 232, 290, 464, 580, 1160, 2320, 8167, 16334, 32668, 40835, 65336, 81670, 130672, 163340, 236843, 326680, 473686, 653360, 947372, 1184215, 1894744, 2368430, 3789488, 4736860, 9473720, 18947440]

約数ペア:

[(1, 18947440), (2, 9473720), (4, 4736860), (5, 3789488), (8, 2368430), (10, 1894744), (16, 1184215), (20, 947372), (29, 653360), (40, 473686), (58, 326680), (80, 236843), (116, 163340), (145, 130672), (232, 81670), (290, 65336), (464, 40835), (580, 32668), (1160, 16334), (2320, 8167)]