669940

素因数分解:

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

素因数の和:112

約数の個数: 48

約数和(自身を含む): 1552320

約数和(自身を除く): 882380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 41, 43, 76, 82, 86, 95, 164, 172, 190, 205, 215, 380, 410, 430, 779, 817, 820, 860, 1558, 1634, 1763, 3116, 3268, 3526, 3895, 4085, 7052, 7790, 8170, 8815, 15580, 16340, 17630, 33497, 35260, 66994, 133988, 167485, 334970, 669940]

約数ペア:

[(1, 669940), (2, 334970), (4, 167485), (5, 133988), (10, 66994), (19, 35260), (20, 33497), (38, 17630), (41, 16340), (43, 15580), (76, 8815), (82, 8170), (86, 7790), (95, 7052), (164, 4085), (172, 3895), (190, 3526), (205, 3268), (215, 3116), (380, 1763), (410, 1634), (430, 1558), (779, 860), (817, 820)]