21091900

素因数分解:

$2^2\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{653}}^1$

素因数の和:703

約数の個数: 72

約数和(自身を含む): 51090480

約数和(自身を除く): 29998580

約数列:

[1, 2, 4, 5, 10, 17, 19, 20, 25, 34, 38, 50, 68, 76, 85, 95, 100, 170, 190, 323, 340, 380, 425, 475, 646, 653, 850, 950, 1292, 1306, 1615, 1700, 1900, 2612, 3230, 3265, 6460, 6530, 8075, 11101, 12407, 13060, 16150, 16325, 22202, 24814, 32300, 32650, 44404, 49628, 55505, 62035, 65300, 111010, 124070, 210919, 222020, 248140, 277525, 310175, 421838, 555050, 620350, 843676, 1054595, 1110100, 1240700, 2109190, 4218380, 5272975, 10545950, 21091900]

約数ペア:

[(1, 21091900), (2, 10545950), (4, 5272975), (5, 4218380), (10, 2109190), (17, 1240700), (19, 1110100), (20, 1054595), (25, 843676), (34, 620350), (38, 555050), (50, 421838), (68, 310175), (76, 277525), (85, 248140), (95, 222020), (100, 210919), (170, 124070), (190, 111010), (323, 65300), (340, 62035), (380, 55505), (425, 49628), (475, 44404), (646, 32650), (653, 32300), (850, 24814), (950, 22202), (1292, 16325), (1306, 16150), (1615, 13060), (1700, 12407), (1900, 11101), (2612, 8075), (3230, 6530), (3265, 6460)]