21005355

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{10529}}^1$

素因数の和:10563

約数の個数: 32

約数和(自身を含む): 40435200

約数和(自身を除く): 19429845

約数列:

[1, 3, 5, 7, 15, 19, 21, 35, 57, 95, 105, 133, 285, 399, 665, 1995, 10529, 31587, 52645, 73703, 157935, 200051, 221109, 368515, 600153, 1000255, 1105545, 1400357, 3000765, 4201071, 7001785, 21005355]

約数ペア:

[(1, 21005355), (3, 7001785), (5, 4201071), (7, 3000765), (15, 1400357), (19, 1105545), (21, 1000255), (35, 600153), (57, 368515), (95, 221109), (105, 200051), (133, 157935), (285, 73703), (399, 52645), (665, 31587), (1995, 10529)]