20490813

素因数分解:

$3^4\times 7^1\times {\mathrm{71}}^1\times {\mathrm{509}}^1$

素因数の和:599

約数の個数: 40

約数和(自身を含む): 35544960

約数和(自身を除く): 15054147

約数列:

[1, 3, 7, 9, 21, 27, 63, 71, 81, 189, 213, 497, 509, 567, 639, 1491, 1527, 1917, 3563, 4473, 4581, 5751, 10689, 13419, 13743, 32067, 36139, 40257, 41229, 96201, 108417, 252973, 288603, 325251, 758919, 975753, 2276757, 2927259, 6830271, 20490813]

約数ペア:

[(1, 20490813), (3, 6830271), (7, 2927259), (9, 2276757), (21, 975753), (27, 758919), (63, 325251), (71, 288603), (81, 252973), (189, 108417), (213, 96201), (497, 41229), (509, 40257), (567, 36139), (639, 32067), (1491, 13743), (1527, 13419), (1917, 10689), (3563, 5751), (4473, 4581)]