20904700

素因数分解:

$2^2\times 5^2\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:247

約数の個数: 72

約数和(自身を含む): 48434400

約数和(自身を除く): 27529700

約数列:

[1, 2, 4, 5, 10, 20, 23, 25, 46, 50, 61, 92, 100, 115, 122, 149, 230, 244, 298, 305, 460, 575, 596, 610, 745, 1150, 1220, 1403, 1490, 1525, 2300, 2806, 2980, 3050, 3427, 3725, 5612, 6100, 6854, 7015, 7450, 9089, 13708, 14030, 14900, 17135, 18178, 28060, 34270, 35075, 36356, 45445, 68540, 70150, 85675, 90890, 140300, 171350, 181780, 209047, 227225, 342700, 418094, 454450, 836188, 908900, 1045235, 2090470, 4180940, 5226175, 10452350, 20904700]

約数ペア:

[(1, 20904700), (2, 10452350), (4, 5226175), (5, 4180940), (10, 2090470), (20, 1045235), (23, 908900), (25, 836188), (46, 454450), (50, 418094), (61, 342700), (92, 227225), (100, 209047), (115, 181780), (122, 171350), (149, 140300), (230, 90890), (244, 85675), (298, 70150), (305, 68540), (460, 45445), (575, 36356), (596, 35075), (610, 34270), (745, 28060), (1150, 18178), (1220, 17135), (1403, 14900), (1490, 14030), (1525, 13708), (2300, 9089), (2806, 7450), (2980, 7015), (3050, 6854), (3427, 6100), (3725, 5612)]