18784340

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:332

約数の個数: 48

約数和(自身を含む): 40778640

約数和(自身を除く): 21994300

約数列:

[1, 2, 4, 5, 10, 20, 61, 89, 122, 173, 178, 244, 305, 346, 356, 445, 610, 692, 865, 890, 1220, 1730, 1780, 3460, 5429, 10553, 10858, 15397, 21106, 21716, 27145, 30794, 42212, 52765, 54290, 61588, 76985, 105530, 108580, 153970, 211060, 307940, 939217, 1878434, 3756868, 4696085, 9392170, 18784340]

約数ペア:

[(1, 18784340), (2, 9392170), (4, 4696085), (5, 3756868), (10, 1878434), (20, 939217), (61, 307940), (89, 211060), (122, 153970), (173, 108580), (178, 105530), (244, 76985), (305, 61588), (346, 54290), (356, 52765), (445, 42212), (610, 30794), (692, 27145), (865, 21716), (890, 21106), (1220, 15397), (1730, 10858), (1780, 10553), (3460, 5429)]