1989500

素因数分解:

$2^2\times 5^3\times {\mathrm{23}}^1\times {\mathrm{173}}^1$

素因数の和:215

約数の個数: 48

約数和(自身を含む): 4560192

約数和(自身を除く): 2570692

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 92, 100, 115, 125, 173, 230, 250, 346, 460, 500, 575, 692, 865, 1150, 1730, 2300, 2875, 3460, 3979, 4325, 5750, 7958, 8650, 11500, 15916, 17300, 19895, 21625, 39790, 43250, 79580, 86500, 99475, 198950, 397900, 497375, 994750, 1989500]

約数ペア:

[(1, 1989500), (2, 994750), (4, 497375), (5, 397900), (10, 198950), (20, 99475), (23, 86500), (25, 79580), (46, 43250), (50, 39790), (92, 21625), (100, 19895), (115, 17300), (125, 15916), (173, 11500), (230, 8650), (250, 7958), (346, 5750), (460, 4325), (500, 3979), (575, 3460), (692, 2875), (865, 2300), (1150, 1730)]