19719700

素因数分解:

$2^2\times 5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{197}}^1$

素因数の和:242

約数の個数: 144

約数和(自身を含む): 57746304

約数和(自身を除く): 38026604

約数列:

[1, 2, 4, 5, 7, 10, 11, 13, 14, 20, 22, 25, 26, 28, 35, 44, 50, 52, 55, 65, 70, 77, 91, 100, 110, 130, 140, 143, 154, 175, 182, 197, 220, 260, 275, 286, 308, 325, 350, 364, 385, 394, 455, 550, 572, 650, 700, 715, 770, 788, 910, 985, 1001, 1100, 1300, 1379, 1430, 1540, 1820, 1925, 1970, 2002, 2167, 2275, 2561, 2758, 2860, 3575, 3850, 3940, 4004, 4334, 4550, 4925, 5005, 5122, 5516, 6895, 7150, 7700, 8668, 9100, 9850, 10010, 10244, 10835, 12805, 13790, 14300, 15169, 17927, 19700, 20020, 21670, 25025, 25610, 27580, 28171, 30338, 34475, 35854, 43340, 50050, 51220, 54175, 56342, 60676, 64025, 68950, 71708, 75845, 89635, 100100, 108350, 112684, 128050, 137900, 140855, 151690, 179270, 197197, 216700, 256100, 281710, 303380, 358540, 379225, 394394, 448175, 563420, 704275, 758450, 788788, 896350, 985985, 1408550, 1516900, 1792700, 1971970, 2817100, 3943940, 4929925, 9859850, 19719700]

約数ペア:

[(1, 19719700), (2, 9859850), (4, 4929925), (5, 3943940), (7, 2817100), (10, 1971970), (11, 1792700), (13, 1516900), (14, 1408550), (20, 985985), (22, 896350), (25, 788788), (26, 758450), (28, 704275), (35, 563420), (44, 448175), (50, 394394), (52, 379225), (55, 358540), (65, 303380), (70, 281710), (77, 256100), (91, 216700), (100, 197197), (110, 179270), (130, 151690), (140, 140855), (143, 137900), (154, 128050), (175, 112684), (182, 108350), (197, 100100), (220, 89635), (260, 75845), (275, 71708), (286, 68950), (308, 64025), (325, 60676), (350, 56342), (364, 54175), (385, 51220), (394, 50050), (455, 43340), (550, 35854), (572, 34475), (650, 30338), (700, 28171), (715, 27580), (770, 25610), (788, 25025), (910, 21670), (985, 20020), (1001, 19700), (1100, 17927), (1300, 15169), (1379, 14300), (1430, 13790), (1540, 12805), (1820, 10835), (1925, 10244), (1970, 10010), (2002, 9850), (2167, 9100), (2275, 8668), (2561, 7700), (2758, 7150), (2860, 6895), (3575, 5516), (3850, 5122), (3940, 5005), (4004, 4925), (4334, 4550)]