20271520

素因数分解:

$2^5\times 5^1\times {\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:174

約数の個数: 96

約数和(自身を含む): 50996736

約数和(自身を除く): 30725216

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 61, 62, 67, 80, 122, 124, 134, 155, 160, 244, 248, 268, 305, 310, 335, 488, 496, 536, 610, 620, 670, 976, 992, 1072, 1220, 1240, 1340, 1891, 1952, 2077, 2144, 2440, 2480, 2680, 3782, 4087, 4154, 4880, 4960, 5360, 7564, 8174, 8308, 9455, 9760, 10385, 10720, 15128, 16348, 16616, 18910, 20435, 20770, 30256, 32696, 33232, 37820, 40870, 41540, 60512, 65392, 66464, 75640, 81740, 83080, 126697, 130784, 151280, 163480, 166160, 253394, 302560, 326960, 332320, 506788, 633485, 653920, 1013576, 1266970, 2027152, 2533940, 4054304, 5067880, 10135760, 20271520]

約数ペア:

[(1, 20271520), (2, 10135760), (4, 5067880), (5, 4054304), (8, 2533940), (10, 2027152), (16, 1266970), (20, 1013576), (31, 653920), (32, 633485), (40, 506788), (61, 332320), (62, 326960), (67, 302560), (80, 253394), (122, 166160), (124, 163480), (134, 151280), (155, 130784), (160, 126697), (244, 83080), (248, 81740), (268, 75640), (305, 66464), (310, 65392), (335, 60512), (488, 41540), (496, 40870), (536, 37820), (610, 33232), (620, 32696), (670, 30256), (976, 20770), (992, 20435), (1072, 18910), (1220, 16616), (1240, 16348), (1340, 15128), (1891, 10720), (1952, 10385), (2077, 9760), (2144, 9455), (2440, 8308), (2480, 8174), (2680, 7564), (3782, 5360), (4087, 4960), (4154, 4880)]