20449000

素因数分解:

$2^3\times 5^3\times {\mathrm{11}}^2\times {\mathrm{13}}^2$

素因数の和:69

約数の個数: 144

約数和(自身を含む): 56953260

約数和(自身を除く): 36504260

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 25, 26, 40, 44, 50, 52, 55, 65, 88, 100, 104, 110, 121, 125, 130, 143, 169, 200, 220, 242, 250, 260, 275, 286, 325, 338, 440, 484, 500, 520, 550, 572, 605, 650, 676, 715, 845, 968, 1000, 1100, 1144, 1210, 1300, 1352, 1375, 1430, 1573, 1625, 1690, 1859, 2200, 2420, 2600, 2750, 2860, 3025, 3146, 3250, 3380, 3575, 3718, 4225, 4840, 5500, 5720, 6050, 6292, 6500, 6760, 7150, 7436, 7865, 8450, 9295, 11000, 12100, 12584, 13000, 14300, 14872, 15125, 15730, 16900, 17875, 18590, 20449, 21125, 24200, 28600, 30250, 31460, 33800, 35750, 37180, 39325, 40898, 42250, 46475, 60500, 62920, 71500, 74360, 78650, 81796, 84500, 92950, 102245, 121000, 143000, 157300, 163592, 169000, 185900, 196625, 204490, 232375, 314600, 371800, 393250, 408980, 464750, 511225, 786500, 817960, 929500, 1022450, 1573000, 1859000, 2044900, 2556125, 4089800, 5112250, 10224500, 20449000]

約数ペア:

[(1, 20449000), (2, 10224500), (4, 5112250), (5, 4089800), (8, 2556125), (10, 2044900), (11, 1859000), (13, 1573000), (20, 1022450), (22, 929500), (25, 817960), (26, 786500), (40, 511225), (44, 464750), (50, 408980), (52, 393250), (55, 371800), (65, 314600), (88, 232375), (100, 204490), (104, 196625), (110, 185900), (121, 169000), (125, 163592), (130, 157300), (143, 143000), (169, 121000), (200, 102245), (220, 92950), (242, 84500), (250, 81796), (260, 78650), (275, 74360), (286, 71500), (325, 62920), (338, 60500), (440, 46475), (484, 42250), (500, 40898), (520, 39325), (550, 37180), (572, 35750), (605, 33800), (650, 31460), (676, 30250), (715, 28600), (845, 24200), (968, 21125), (1000, 20449), (1100, 18590), (1144, 17875), (1210, 16900), (1300, 15730), (1352, 15125), (1375, 14872), (1430, 14300), (1573, 13000), (1625, 12584), (1690, 12100), (1859, 11000), (2200, 9295), (2420, 8450), (2600, 7865), (2750, 7436), (2860, 7150), (3025, 6760), (3146, 6500), (3250, 6292), (3380, 6050), (3575, 5720), (3718, 5500), (4225, 4840)]