18478720

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{2221}}^1$

素因数の和:2253

約数の個数: 64

約数和(自身を含む): 47595240

約数和(自身を除く): 29116520

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 64, 65, 80, 104, 128, 130, 160, 208, 260, 320, 416, 520, 640, 832, 1040, 1664, 2080, 2221, 4160, 4442, 8320, 8884, 11105, 17768, 22210, 28873, 35536, 44420, 57746, 71072, 88840, 115492, 142144, 144365, 177680, 230984, 284288, 288730, 355360, 461968, 577460, 710720, 923936, 1154920, 1421440, 1847872, 2309840, 3695744, 4619680, 9239360, 18478720]

約数ペア:

[(1, 18478720), (2, 9239360), (4, 4619680), (5, 3695744), (8, 2309840), (10, 1847872), (13, 1421440), (16, 1154920), (20, 923936), (26, 710720), (32, 577460), (40, 461968), (52, 355360), (64, 288730), (65, 284288), (80, 230984), (104, 177680), (128, 144365), (130, 142144), (160, 115492), (208, 88840), (260, 71072), (320, 57746), (416, 44420), (520, 35536), (640, 28873), (832, 22210), (1040, 17768), (1664, 11105), (2080, 8884), (2221, 8320), (4160, 4442)]