18504020

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{157}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 40134528

約数和(自身を除く): 21630508

約数列:

[1, 2, 4, 5, 10, 20, 71, 83, 142, 157, 166, 284, 314, 332, 355, 415, 628, 710, 785, 830, 1420, 1570, 1660, 3140, 5893, 11147, 11786, 13031, 22294, 23572, 26062, 29465, 44588, 52124, 55735, 58930, 65155, 111470, 117860, 130310, 222940, 260620, 925201, 1850402, 3700804, 4626005, 9252010, 18504020]

約数ペア:

[(1, 18504020), (2, 9252010), (4, 4626005), (5, 3700804), (10, 1850402), (20, 925201), (71, 260620), (83, 222940), (142, 130310), (157, 117860), (166, 111470), (284, 65155), (314, 58930), (332, 55735), (355, 52124), (415, 44588), (628, 29465), (710, 26062), (785, 23572), (830, 22294), (1420, 13031), (1570, 11786), (1660, 11147), (3140, 5893)]