21156160

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{3889}}^1$

素因数の和:3923

約数の個数: 56

約数和(自身を含む): 53355240

約数和(自身を除く): 32199080

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 136, 160, 170, 272, 320, 340, 544, 680, 1088, 1360, 2720, 3889, 5440, 7778, 15556, 19445, 31112, 38890, 62224, 66113, 77780, 124448, 132226, 155560, 248896, 264452, 311120, 330565, 528904, 622240, 661130, 1057808, 1244480, 1322260, 2115616, 2644520, 4231232, 5289040, 10578080, 21156160]

約数ペア:

[(1, 21156160), (2, 10578080), (4, 5289040), (5, 4231232), (8, 2644520), (10, 2115616), (16, 1322260), (17, 1244480), (20, 1057808), (32, 661130), (34, 622240), (40, 528904), (64, 330565), (68, 311120), (80, 264452), (85, 248896), (136, 155560), (160, 132226), (170, 124448), (272, 77780), (320, 66113), (340, 62224), (544, 38890), (680, 31112), (1088, 19445), (1360, 15556), (2720, 7778), (3889, 5440)]