21779037

素因数分解:

$3^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{541}}^1$

素因数の和:631

約数の個数: 40

約数和(自身を含む): 37775232

約数和(自身を除く): 15996195

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 81, 189, 213, 497, 541, 567, 639, 1491, 1623, 1917, 3787, 4473, 4869, 5751, 11361, 13419, 14607, 34083, 38411, 40257, 43821, 102249, 115233, 268877, 306747, 345699, 806631, 1037097, 2419893, 3111291, 7259679, 21779037]

約数ペア:

[(1, 21779037), (3, 7259679), (7, 3111291), (9, 2419893), (21, 1037097), (27, 806631), (63, 345699), (71, 306747), (81, 268877), (189, 115233), (213, 102249), (497, 43821), (541, 40257), (567, 38411), (639, 34083), (1491, 14607), (1623, 13419), (1917, 11361), (3787, 5751), (4473, 4869)]