21377408

素因数分解:

$2^7\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{443}}^1$

素因数の和:499

約数の個数: 64

約数和(自身を含む): 47552400

約数和(自身を除く): 26174992

約数列:

[1, 2, 4, 8, 13, 16, 26, 29, 32, 52, 58, 64, 104, 116, 128, 208, 232, 377, 416, 443, 464, 754, 832, 886, 928, 1508, 1664, 1772, 1856, 3016, 3544, 3712, 5759, 6032, 7088, 11518, 12064, 12847, 14176, 23036, 24128, 25694, 28352, 46072, 48256, 51388, 56704, 92144, 102776, 167011, 184288, 205552, 334022, 368576, 411104, 668044, 737152, 822208, 1336088, 1644416, 2672176, 5344352, 10688704, 21377408]

約数ペア:

[(1, 21377408), (2, 10688704), (4, 5344352), (8, 2672176), (13, 1644416), (16, 1336088), (26, 822208), (29, 737152), (32, 668044), (52, 411104), (58, 368576), (64, 334022), (104, 205552), (116, 184288), (128, 167011), (208, 102776), (232, 92144), (377, 56704), (416, 51388), (443, 48256), (464, 46072), (754, 28352), (832, 25694), (886, 24128), (928, 23036), (1508, 14176), (1664, 12847), (1772, 12064), (1856, 11518), (3016, 7088), (3544, 6032), (3712, 5759)]