28178680

素因数分解:

$2^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{109}}^1\times {\mathrm{281}}^1$

素因数の和:424

約数の個数: 64

約数和(自身を含む): 67003200

約数和(自身を除く): 38824520

約数列:

[1, 2, 4, 5, 8, 10, 20, 23, 40, 46, 92, 109, 115, 184, 218, 230, 281, 436, 460, 545, 562, 872, 920, 1090, 1124, 1405, 2180, 2248, 2507, 2810, 4360, 5014, 5620, 6463, 10028, 11240, 12535, 12926, 20056, 25070, 25852, 30629, 32315, 50140, 51704, 61258, 64630, 100280, 122516, 129260, 153145, 245032, 258520, 306290, 612580, 704467, 1225160, 1408934, 2817868, 3522335, 5635736, 7044670, 14089340, 28178680]

約数ペア:

[(1, 28178680), (2, 14089340), (4, 7044670), (5, 5635736), (8, 3522335), (10, 2817868), (20, 1408934), (23, 1225160), (40, 704467), (46, 612580), (92, 306290), (109, 258520), (115, 245032), (184, 153145), (218, 129260), (230, 122516), (281, 100280), (436, 64630), (460, 61258), (545, 51704), (562, 50140), (872, 32315), (920, 30629), (1090, 25852), (1124, 25070), (1405, 20056), (2180, 12926), (2248, 12535), (2507, 11240), (2810, 10028), (4360, 6463), (5014, 5620)]