81771820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{16553}}^1$

素因数の和:16594

約数の個数: 48

約数和(自身を含む): 194675040

約数和(自身を除く): 112903220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 190, 247, 260, 380, 494, 988, 1235, 2470, 4940, 16553, 33106, 66212, 82765, 165530, 215189, 314507, 331060, 430378, 629014, 860756, 1075945, 1258028, 1572535, 2151890, 3145070, 4088591, 4303780, 6290140, 8177182, 16354364, 20442955, 40885910, 81771820]

約数ペア:

[(1, 81771820), (2, 40885910), (4, 20442955), (5, 16354364), (10, 8177182), (13, 6290140), (19, 4303780), (20, 4088591), (26, 3145070), (38, 2151890), (52, 1572535), (65, 1258028), (76, 1075945), (95, 860756), (130, 629014), (190, 430378), (247, 331060), (260, 314507), (380, 215189), (494, 165530), (988, 82765), (1235, 66212), (2470, 33106), (4940, 16553)]