20711440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{97}}^1\times {\mathrm{157}}^1$

素因数の和:284

約数の個数: 80

約数和(自身を含む): 51840432

約数和(自身を除く): 31128992

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 97, 136, 157, 170, 194, 272, 314, 340, 388, 485, 628, 680, 776, 785, 970, 1256, 1360, 1552, 1570, 1649, 1940, 2512, 2669, 3140, 3298, 3880, 5338, 6280, 6596, 7760, 8245, 10676, 12560, 13192, 13345, 15229, 16490, 21352, 26384, 26690, 30458, 32980, 42704, 53380, 60916, 65960, 76145, 106760, 121832, 131920, 152290, 213520, 243664, 258893, 304580, 517786, 609160, 1035572, 1218320, 1294465, 2071144, 2588930, 4142288, 5177860, 10355720, 20711440]

約数ペア:

[(1, 20711440), (2, 10355720), (4, 5177860), (5, 4142288), (8, 2588930), (10, 2071144), (16, 1294465), (17, 1218320), (20, 1035572), (34, 609160), (40, 517786), (68, 304580), (80, 258893), (85, 243664), (97, 213520), (136, 152290), (157, 131920), (170, 121832), (194, 106760), (272, 76145), (314, 65960), (340, 60916), (388, 53380), (485, 42704), (628, 32980), (680, 30458), (776, 26690), (785, 26384), (970, 21352), (1256, 16490), (1360, 15229), (1552, 13345), (1570, 13192), (1649, 12560), (1940, 10676), (2512, 8245), (2669, 7760), (3140, 6596), (3298, 6280), (3880, 5338)]