21910340

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{83}}^1\times {\mathrm{197}}^1$

素因数の和:356

約数の個数: 48

約数和(自身を含む): 47500992

約数和(自身を除く): 25590652

約数列:

[1, 2, 4, 5, 10, 20, 67, 83, 134, 166, 197, 268, 332, 335, 394, 415, 670, 788, 830, 985, 1340, 1660, 1970, 3940, 5561, 11122, 13199, 16351, 22244, 26398, 27805, 32702, 52796, 55610, 65404, 65995, 81755, 111220, 131990, 163510, 263980, 327020, 1095517, 2191034, 4382068, 5477585, 10955170, 21910340]

約数ペア:

[(1, 21910340), (2, 10955170), (4, 5477585), (5, 4382068), (10, 2191034), (20, 1095517), (67, 327020), (83, 263980), (134, 163510), (166, 131990), (197, 111220), (268, 81755), (332, 65995), (335, 65404), (394, 55610), (415, 52796), (670, 32702), (788, 27805), (830, 26398), (985, 22244), (1340, 16351), (1660, 13199), (1970, 11122), (3940, 5561)]