21117840

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{87991}}^1$

素因数の和:88007

約数の個数: 40

約数和(自身を含む): 65466048

約数和(自身を除く): 44348208

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 87991, 175982, 263973, 351964, 439955, 527946, 703928, 879910, 1055892, 1319865, 1407856, 1759820, 2111784, 2639730, 3519640, 4223568, 5279460, 7039280, 10558920, 21117840]

約数ペア:

[(1, 21117840), (2, 10558920), (3, 7039280), (4, 5279460), (5, 4223568), (6, 3519640), (8, 2639730), (10, 2111784), (12, 1759820), (15, 1407856), (16, 1319865), (20, 1055892), (24, 879910), (30, 703928), (40, 527946), (48, 439955), (60, 351964), (80, 263973), (120, 175982), (240, 87991)]