217872680

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{320401}}^1$

素因数の和:320429

約数の個数: 32

約数和(自身を含む): 519051240

約数和(自身を除く): 301178560

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 34, 40, 68, 85, 136, 170, 340, 680, 320401, 640802, 1281604, 1602005, 2563208, 3204010, 5446817, 6408020, 10893634, 12816040, 21787268, 27234085, 43574536, 54468170, 108936340, 217872680]

約数ペア:

[(1, 217872680), (2, 108936340), (4, 54468170), (5, 43574536), (8, 27234085), (10, 21787268), (17, 12816040), (20, 10893634), (34, 6408020), (40, 5446817), (68, 3204010), (85, 2563208), (136, 1602005), (170, 1281604), (340, 640802), (680, 320401)]