18940480

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{157}}^1$

素因数の和:216

約数の個数: 112

約数和(自身を含む): 50566320

約数和(自身を除く): 31625840

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 32, 40, 52, 58, 64, 65, 80, 104, 116, 130, 145, 157, 160, 208, 232, 260, 290, 314, 320, 377, 416, 464, 520, 580, 628, 754, 785, 832, 928, 1040, 1160, 1256, 1508, 1570, 1856, 1885, 2041, 2080, 2320, 2512, 3016, 3140, 3770, 4082, 4160, 4553, 4640, 5024, 6032, 6280, 7540, 8164, 9106, 9280, 10048, 10205, 12064, 12560, 15080, 16328, 18212, 20410, 22765, 24128, 25120, 30160, 32656, 36424, 40820, 45530, 50240, 59189, 60320, 65312, 72848, 81640, 91060, 118378, 120640, 130624, 145696, 163280, 182120, 236756, 291392, 295945, 326560, 364240, 473512, 591890, 653120, 728480, 947024, 1183780, 1456960, 1894048, 2367560, 3788096, 4735120, 9470240, 18940480]

約数ペア:

[(1, 18940480), (2, 9470240), (4, 4735120), (5, 3788096), (8, 2367560), (10, 1894048), (13, 1456960), (16, 1183780), (20, 947024), (26, 728480), (29, 653120), (32, 591890), (40, 473512), (52, 364240), (58, 326560), (64, 295945), (65, 291392), (80, 236756), (104, 182120), (116, 163280), (130, 145696), (145, 130624), (157, 120640), (160, 118378), (208, 91060), (232, 81640), (260, 72848), (290, 65312), (314, 60320), (320, 59189), (377, 50240), (416, 45530), (464, 40820), (520, 36424), (580, 32656), (628, 30160), (754, 25120), (785, 24128), (832, 22765), (928, 20410), (1040, 18212), (1160, 16328), (1256, 15080), (1508, 12560), (1570, 12064), (1856, 10205), (1885, 10048), (2041, 9280), (2080, 9106), (2320, 8164), (2512, 7540), (3016, 6280), (3140, 6032), (3770, 5024), (4082, 4640), (4160, 4553)]