18919760

素因数分解:

$2^4\times 5^1\times {\mathrm{61}}^1\times {\mathrm{3877}}^1$

素因数の和:3951

約数の個数: 40

約数和(自身を含む): 44721096

約数和(自身を除く): 25801336

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 61, 80, 122, 244, 305, 488, 610, 976, 1220, 2440, 3877, 4880, 7754, 15508, 19385, 31016, 38770, 62032, 77540, 155080, 236497, 310160, 472994, 945988, 1182485, 1891976, 2364970, 3783952, 4729940, 9459880, 18919760]

約数ペア:

[(1, 18919760), (2, 9459880), (4, 4729940), (5, 3783952), (8, 2364970), (10, 1891976), (16, 1182485), (20, 945988), (40, 472994), (61, 310160), (80, 236497), (122, 155080), (244, 77540), (305, 62032), (488, 38770), (610, 31016), (976, 19385), (1220, 15508), (2440, 7754), (3877, 4880)]