21281200

素因数分解:

$2^4\times 5^2\times {\mathrm{83}}^1\times {\mathrm{641}}^1$

素因数の和:742

約数の個数: 60

約数和(自身を含む): 51824808

約数和(自身を除く): 30543608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 83, 100, 166, 200, 332, 400, 415, 641, 664, 830, 1282, 1328, 1660, 2075, 2564, 3205, 3320, 4150, 5128, 6410, 6640, 8300, 10256, 12820, 16025, 16600, 25640, 32050, 33200, 51280, 53203, 64100, 106406, 128200, 212812, 256400, 266015, 425624, 532030, 851248, 1064060, 1330075, 2128120, 2660150, 4256240, 5320300, 10640600, 21281200]

約数ペア:

[(1, 21281200), (2, 10640600), (4, 5320300), (5, 4256240), (8, 2660150), (10, 2128120), (16, 1330075), (20, 1064060), (25, 851248), (40, 532030), (50, 425624), (80, 266015), (83, 256400), (100, 212812), (166, 128200), (200, 106406), (332, 64100), (400, 53203), (415, 51280), (641, 33200), (664, 32050), (830, 25640), (1282, 16600), (1328, 16025), (1660, 12820), (2075, 10256), (2564, 8300), (3205, 6640), (3320, 6410), (4150, 5128)]