20703280

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{1171}}^1$

素因数の和:1214

約数の個数: 80

約数和(自身を含む): 54933984

約数和(自身を除く): 34230704

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 26, 34, 40, 52, 65, 68, 80, 85, 104, 130, 136, 170, 208, 221, 260, 272, 340, 442, 520, 680, 884, 1040, 1105, 1171, 1360, 1768, 2210, 2342, 3536, 4420, 4684, 5855, 8840, 9368, 11710, 15223, 17680, 18736, 19907, 23420, 30446, 39814, 46840, 60892, 76115, 79628, 93680, 99535, 121784, 152230, 159256, 199070, 243568, 258791, 304460, 318512, 398140, 517582, 608920, 796280, 1035164, 1217840, 1293955, 1592560, 2070328, 2587910, 4140656, 5175820, 10351640, 20703280]

約数ペア:

[(1, 20703280), (2, 10351640), (4, 5175820), (5, 4140656), (8, 2587910), (10, 2070328), (13, 1592560), (16, 1293955), (17, 1217840), (20, 1035164), (26, 796280), (34, 608920), (40, 517582), (52, 398140), (65, 318512), (68, 304460), (80, 258791), (85, 243568), (104, 199070), (130, 159256), (136, 152230), (170, 121784), (208, 99535), (221, 93680), (260, 79628), (272, 76115), (340, 60892), (442, 46840), (520, 39814), (680, 30446), (884, 23420), (1040, 19907), (1105, 18736), (1171, 17680), (1360, 15223), (1768, 11710), (2210, 9368), (2342, 8840), (3536, 5855), (4420, 4684)]