12728860

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^2\times {\mathrm{41}}^1\times {\mathrm{43}}^1$

素因数の和:131

約数の個数: 72

約数和(自身を含む): 29571696

約数和(自身を除く): 16842836

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 43, 76, 82, 86, 95, 164, 172, 190, 205, 215, 361, 380, 410, 430, 722, 779, 817, 820, 860, 1444, 1558, 1634, 1763, 1805, 3116, 3268, 3526, 3610, 3895, 4085, 7052, 7220, 7790, 8170, 8815, 14801, 15523, 15580, 16340, 17630, 29602, 31046, 33497, 35260, 59204, 62092, 66994, 74005, 77615, 133988, 148010, 155230, 167485, 296020, 310460, 334970, 636443, 669940, 1272886, 2545772, 3182215, 6364430, 12728860]

約数ペア:

[(1, 12728860), (2, 6364430), (4, 3182215), (5, 2545772), (10, 1272886), (19, 669940), (20, 636443), (38, 334970), (41, 310460), (43, 296020), (76, 167485), (82, 155230), (86, 148010), (95, 133988), (164, 77615), (172, 74005), (190, 66994), (205, 62092), (215, 59204), (361, 35260), (380, 33497), (410, 31046), (430, 29602), (722, 17630), (779, 16340), (817, 15580), (820, 15523), (860, 14801), (1444, 8815), (1558, 8170), (1634, 7790), (1763, 7220), (1805, 7052), (3116, 4085), (3268, 3895), (3526, 3610)]