21407365

素因数分解:

$5^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{131}}^1$

素因数の和:202

約数の個数: 48

約数和(自身を含む): 32503680

約数和(自身を除く): 11096315

約数列:

[1, 5, 7, 23, 29, 35, 49, 115, 131, 145, 161, 203, 245, 655, 667, 805, 917, 1015, 1127, 1421, 3013, 3335, 3799, 4585, 4669, 5635, 6419, 7105, 15065, 18995, 21091, 23345, 26593, 32095, 32683, 87377, 105455, 132965, 147637, 163415, 186151, 436885, 611639, 738185, 930755, 3058195, 4281473, 21407365]

約数ペア:

[(1, 21407365), (5, 4281473), (7, 3058195), (23, 930755), (29, 738185), (35, 611639), (49, 436885), (115, 186151), (131, 163415), (145, 147637), (161, 132965), (203, 105455), (245, 87377), (655, 32683), (667, 32095), (805, 26593), (917, 23345), (1015, 21091), (1127, 18995), (1421, 15065), (3013, 7105), (3335, 6419), (3799, 5635), (4585, 4669)]