21440560

素因数分解:

$2^4\times 5^1\times {\mathrm{83}}^1\times {\mathrm{3229}}^1$

素因数の和:3325

約数の個数: 40

約数和(自身を含む): 50465520

約数和(自身を除く): 29024960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 83, 166, 332, 415, 664, 830, 1328, 1660, 3229, 3320, 6458, 6640, 12916, 16145, 25832, 32290, 51664, 64580, 129160, 258320, 268007, 536014, 1072028, 1340035, 2144056, 2680070, 4288112, 5360140, 10720280, 21440560]

約数ペア:

[(1, 21440560), (2, 10720280), (4, 5360140), (5, 4288112), (8, 2680070), (10, 2144056), (16, 1340035), (20, 1072028), (40, 536014), (80, 268007), (83, 258320), (166, 129160), (332, 64580), (415, 51664), (664, 32290), (830, 25832), (1328, 16145), (1660, 12916), (3229, 6640), (3320, 6458)]