21919160

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{191}}^1$

素因数の和:372

約数の個数: 64

約数和(自身を含む): 52531200

約数和(自身を除く): 30612040

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 151, 152, 190, 191, 302, 380, 382, 604, 755, 760, 764, 955, 1208, 1510, 1528, 1910, 2869, 3020, 3629, 3820, 5738, 6040, 7258, 7640, 11476, 14345, 14516, 18145, 22952, 28690, 28841, 29032, 36290, 57380, 57682, 72580, 114760, 115364, 144205, 145160, 230728, 288410, 547979, 576820, 1095958, 1153640, 2191916, 2739895, 4383832, 5479790, 10959580, 21919160]

約数ペア:

[(1, 21919160), (2, 10959580), (4, 5479790), (5, 4383832), (8, 2739895), (10, 2191916), (19, 1153640), (20, 1095958), (38, 576820), (40, 547979), (76, 288410), (95, 230728), (151, 145160), (152, 144205), (190, 115364), (191, 114760), (302, 72580), (380, 57682), (382, 57380), (604, 36290), (755, 29032), (760, 28841), (764, 28690), (955, 22952), (1208, 18145), (1510, 14516), (1528, 14345), (1910, 11476), (2869, 7640), (3020, 7258), (3629, 6040), (3820, 5738)]