21555200

素因数分解:

$2^{11}\times 5^2\times {\mathrm{421}}^1$

素因数の和:453

約数の個数: 72

約数和(自身を含む): 53570790

約数和(自身を除く): 32015590

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 128, 160, 200, 256, 320, 400, 421, 512, 640, 800, 842, 1024, 1280, 1600, 1684, 2048, 2105, 2560, 3200, 3368, 4210, 5120, 6400, 6736, 8420, 10240, 10525, 12800, 13472, 16840, 21050, 25600, 26944, 33680, 42100, 51200, 53888, 67360, 84200, 107776, 134720, 168400, 215552, 269440, 336800, 431104, 538880, 673600, 862208, 1077760, 1347200, 2155520, 2694400, 4311040, 5388800, 10777600, 21555200]

約数ペア:

[(1, 21555200), (2, 10777600), (4, 5388800), (5, 4311040), (8, 2694400), (10, 2155520), (16, 1347200), (20, 1077760), (25, 862208), (32, 673600), (40, 538880), (50, 431104), (64, 336800), (80, 269440), (100, 215552), (128, 168400), (160, 134720), (200, 107776), (256, 84200), (320, 67360), (400, 53888), (421, 51200), (512, 42100), (640, 33680), (800, 26944), (842, 25600), (1024, 21050), (1280, 16840), (1600, 13472), (1684, 12800), (2048, 10525), (2105, 10240), (2560, 8420), (3200, 6736), (3368, 6400), (4210, 5120)]