21223760

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{13963}}^1$

素因数の和:13995

約数の個数: 40

約数和(自身を含む): 51946080

約数和(自身を除く): 30722320

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 13963, 27926, 55852, 69815, 111704, 139630, 223408, 265297, 279260, 530594, 558520, 1061188, 1117040, 1326485, 2122376, 2652970, 4244752, 5305940, 10611880, 21223760]

約数ペア:

[(1, 21223760), (2, 10611880), (4, 5305940), (5, 4244752), (8, 2652970), (10, 2122376), (16, 1326485), (19, 1117040), (20, 1061188), (38, 558520), (40, 530594), (76, 279260), (80, 265297), (95, 223408), (152, 139630), (190, 111704), (304, 69815), (380, 55852), (760, 27926), (1520, 13963)]