21616520

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{383}}^1$

素因数の和:494

約数の個数: 64

約数和(自身を含む): 52254720

約数和(自身を除く): 30638200

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 83, 85, 136, 166, 170, 332, 340, 383, 415, 664, 680, 766, 830, 1411, 1532, 1660, 1915, 2822, 3064, 3320, 3830, 5644, 6511, 7055, 7660, 11288, 13022, 14110, 15320, 26044, 28220, 31789, 32555, 52088, 56440, 63578, 65110, 127156, 130220, 158945, 254312, 260440, 317890, 540413, 635780, 1080826, 1271560, 2161652, 2702065, 4323304, 5404130, 10808260, 21616520]

約数ペア:

[(1, 21616520), (2, 10808260), (4, 5404130), (5, 4323304), (8, 2702065), (10, 2161652), (17, 1271560), (20, 1080826), (34, 635780), (40, 540413), (68, 317890), (83, 260440), (85, 254312), (136, 158945), (166, 130220), (170, 127156), (332, 65110), (340, 63578), (383, 56440), (415, 52088), (664, 32555), (680, 31789), (766, 28220), (830, 26044), (1411, 15320), (1532, 14110), (1660, 13022), (1915, 11288), (2822, 7660), (3064, 7055), (3320, 6511), (3830, 5644)]