641440

素因数分解:

$2^5\times 5^1\times {\mathrm{19}}^1\times {\mathrm{211}}^1$

素因数の和:245

約数の個数: 48

約数和(自身を含む): 1602720

約数和(自身を除く): 961280

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 76, 80, 95, 152, 160, 190, 211, 304, 380, 422, 608, 760, 844, 1055, 1520, 1688, 2110, 3040, 3376, 4009, 4220, 6752, 8018, 8440, 16036, 16880, 20045, 32072, 33760, 40090, 64144, 80180, 128288, 160360, 320720, 641440]

約数ペア:

[(1, 641440), (2, 320720), (4, 160360), (5, 128288), (8, 80180), (10, 64144), (16, 40090), (19, 33760), (20, 32072), (32, 20045), (38, 16880), (40, 16036), (76, 8440), (80, 8018), (95, 6752), (152, 4220), (160, 4009), (190, 3376), (211, 3040), (304, 2110), (380, 1688), (422, 1520), (608, 1055), (760, 844)]