21955160

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{389}}^1$

素因数の和:500

約数の個数: 64

約数和(自身を含む): 53071200

約数和(自身を除く): 31116040

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 83, 85, 136, 166, 170, 332, 340, 389, 415, 664, 680, 778, 830, 1411, 1556, 1660, 1945, 2822, 3112, 3320, 3890, 5644, 6613, 7055, 7780, 11288, 13226, 14110, 15560, 26452, 28220, 32287, 33065, 52904, 56440, 64574, 66130, 129148, 132260, 161435, 258296, 264520, 322870, 548879, 645740, 1097758, 1291480, 2195516, 2744395, 4391032, 5488790, 10977580, 21955160]

約数ペア:

[(1, 21955160), (2, 10977580), (4, 5488790), (5, 4391032), (8, 2744395), (10, 2195516), (17, 1291480), (20, 1097758), (34, 645740), (40, 548879), (68, 322870), (83, 264520), (85, 258296), (136, 161435), (166, 132260), (170, 129148), (332, 66130), (340, 64574), (389, 56440), (415, 52904), (664, 33065), (680, 32287), (778, 28220), (830, 26452), (1411, 15560), (1556, 14110), (1660, 13226), (1945, 11288), (2822, 7780), (3112, 7055), (3320, 6613), (3890, 5644)]