21756843

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{67}}^1\times {\mathrm{211}}^1$

素因数の和:309

約数の個数: 40

約数和(自身を含む): 34886720

約数和(自身を除く): 13129877

約数列:

[1, 3, 9, 19, 27, 57, 67, 81, 171, 201, 211, 513, 603, 633, 1273, 1539, 1809, 1899, 3819, 4009, 5427, 5697, 11457, 12027, 14137, 17091, 34371, 36081, 42411, 103113, 108243, 127233, 268603, 324729, 381699, 805809, 1145097, 2417427, 7252281, 21756843]

約数ペア:

[(1, 21756843), (3, 7252281), (9, 2417427), (19, 1145097), (27, 805809), (57, 381699), (67, 324729), (81, 268603), (171, 127233), (201, 108243), (211, 103113), (513, 42411), (603, 36081), (633, 34371), (1273, 17091), (1539, 14137), (1809, 12027), (1899, 11457), (3819, 5697), (4009, 5427)]