21579520

素因数分解:

$2^8\times 5^1\times {\mathrm{23}}^1\times {\mathrm{733}}^1$

素因数の和:777

約数の個数: 72

約数和(自身を含む): 54010656

約数和(自身を除く): 32431136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 23, 32, 40, 46, 64, 80, 92, 115, 128, 160, 184, 230, 256, 320, 368, 460, 640, 733, 736, 920, 1280, 1466, 1472, 1840, 2932, 2944, 3665, 3680, 5864, 5888, 7330, 7360, 11728, 14660, 14720, 16859, 23456, 29320, 29440, 33718, 46912, 58640, 67436, 84295, 93824, 117280, 134872, 168590, 187648, 234560, 269744, 337180, 469120, 539488, 674360, 938240, 1078976, 1348720, 2157952, 2697440, 4315904, 5394880, 10789760, 21579520]

約数ペア:

[(1, 21579520), (2, 10789760), (4, 5394880), (5, 4315904), (8, 2697440), (10, 2157952), (16, 1348720), (20, 1078976), (23, 938240), (32, 674360), (40, 539488), (46, 469120), (64, 337180), (80, 269744), (92, 234560), (115, 187648), (128, 168590), (160, 134872), (184, 117280), (230, 93824), (256, 84295), (320, 67436), (368, 58640), (460, 46912), (640, 33718), (733, 29440), (736, 29320), (920, 23456), (1280, 16859), (1466, 14720), (1472, 14660), (1840, 11728), (2932, 7360), (2944, 7330), (3665, 5888), (3680, 5864)]