18236990

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{89}}^1\times {\mathrm{661}}^1$

素因数の和:788

約数の個数: 32

約数和(自身を含む): 34318080

約数和(自身を除く): 16081090

約数列:

[1, 2, 5, 10, 31, 62, 89, 155, 178, 310, 445, 661, 890, 1322, 2759, 3305, 5518, 6610, 13795, 20491, 27590, 40982, 58829, 102455, 117658, 204910, 294145, 588290, 1823699, 3647398, 9118495, 18236990]

約数ペア:

[(1, 18236990), (2, 9118495), (5, 3647398), (10, 1823699), (31, 588290), (62, 294145), (89, 204910), (155, 117658), (178, 102455), (310, 58829), (445, 40982), (661, 27590), (890, 20491), (1322, 13795), (2759, 6610), (3305, 5518)]