28378540

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1\times {\mathrm{149}}^1$

素因数の和:354

約数の個数: 48

約数和(自身を含む): 61236000

約数和(自身を除く): 32857460

約数列:

[1, 2, 4, 5, 10, 20, 89, 107, 149, 178, 214, 298, 356, 428, 445, 535, 596, 745, 890, 1070, 1490, 1780, 2140, 2980, 9523, 13261, 15943, 19046, 26522, 31886, 38092, 47615, 53044, 63772, 66305, 79715, 95230, 132610, 159430, 190460, 265220, 318860, 1418927, 2837854, 5675708, 7094635, 14189270, 28378540]

約数ペア:

[(1, 28378540), (2, 14189270), (4, 7094635), (5, 5675708), (10, 2837854), (20, 1418927), (89, 318860), (107, 265220), (149, 190460), (178, 159430), (214, 132610), (298, 95230), (356, 79715), (428, 66305), (445, 63772), (535, 53044), (596, 47615), (745, 38092), (890, 31886), (1070, 26522), (1490, 19046), (1780, 15943), (2140, 13261), (2980, 9523)]