20246720

素因数分解:

$2^6\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:218

約数の個数: 112

約数和(自身を含む): 53937408

約数和(自身を除く): 33690688

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 31, 32, 40, 52, 62, 64, 65, 80, 104, 124, 130, 155, 157, 160, 208, 248, 260, 310, 314, 320, 403, 416, 496, 520, 620, 628, 785, 806, 832, 992, 1040, 1240, 1256, 1570, 1612, 1984, 2015, 2041, 2080, 2480, 2512, 3140, 3224, 4030, 4082, 4160, 4867, 4960, 5024, 6280, 6448, 8060, 8164, 9734, 9920, 10048, 10205, 12560, 12896, 16120, 16328, 19468, 20410, 24335, 25120, 25792, 32240, 32656, 38936, 40820, 48670, 50240, 63271, 64480, 65312, 77872, 81640, 97340, 126542, 128960, 130624, 155744, 163280, 194680, 253084, 311488, 316355, 326560, 389360, 506168, 632710, 653120, 778720, 1012336, 1265420, 1557440, 2024672, 2530840, 4049344, 5061680, 10123360, 20246720]

約数ペア:

[(1, 20246720), (2, 10123360), (4, 5061680), (5, 4049344), (8, 2530840), (10, 2024672), (13, 1557440), (16, 1265420), (20, 1012336), (26, 778720), (31, 653120), (32, 632710), (40, 506168), (52, 389360), (62, 326560), (64, 316355), (65, 311488), (80, 253084), (104, 194680), (124, 163280), (130, 155744), (155, 130624), (157, 128960), (160, 126542), (208, 97340), (248, 81640), (260, 77872), (310, 65312), (314, 64480), (320, 63271), (403, 50240), (416, 48670), (496, 40820), (520, 38936), (620, 32656), (628, 32240), (785, 25792), (806, 25120), (832, 24335), (992, 20410), (1040, 19468), (1240, 16328), (1256, 16120), (1570, 12896), (1612, 12560), (1984, 10205), (2015, 10048), (2041, 9920), (2080, 9734), (2480, 8164), (2512, 8060), (3140, 6448), (3224, 6280), (4030, 5024), (4082, 4960), (4160, 4867)]