21673280

素因数分解:

$2^6\times 5^1\times {\mathrm{89}}^1\times {\mathrm{761}}^1$

素因数の和:867

約数の個数: 56

約数和(自身を含む): 52257960

約数和(自身を除く): 30584680

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 89, 160, 178, 320, 356, 445, 712, 761, 890, 1424, 1522, 1780, 2848, 3044, 3560, 3805, 5696, 6088, 7120, 7610, 12176, 14240, 15220, 24352, 28480, 30440, 48704, 60880, 67729, 121760, 135458, 243520, 270916, 338645, 541832, 677290, 1083664, 1354580, 2167328, 2709160, 4334656, 5418320, 10836640, 21673280]

約数ペア:

[(1, 21673280), (2, 10836640), (4, 5418320), (5, 4334656), (8, 2709160), (10, 2167328), (16, 1354580), (20, 1083664), (32, 677290), (40, 541832), (64, 338645), (80, 270916), (89, 243520), (160, 135458), (178, 121760), (320, 67729), (356, 60880), (445, 48704), (712, 30440), (761, 28480), (890, 24352), (1424, 15220), (1522, 14240), (1780, 12176), (2848, 7610), (3044, 7120), (3560, 6088), (3805, 5696)]