20322260

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{89}}^1\times {\mathrm{233}}^1$

素因数の和:345

約数の個数: 72

約数和(自身を含む): 50417640

約数和(自身を除く): 30095380

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 89, 98, 140, 178, 196, 233, 245, 356, 445, 466, 490, 623, 890, 932, 980, 1165, 1246, 1631, 1780, 2330, 2492, 3115, 3262, 4361, 4660, 6230, 6524, 8155, 8722, 11417, 12460, 16310, 17444, 20737, 21805, 22834, 32620, 41474, 43610, 45668, 57085, 82948, 87220, 103685, 114170, 145159, 207370, 228340, 290318, 414740, 580636, 725795, 1016113, 1451590, 2032226, 2903180, 4064452, 5080565, 10161130, 20322260]

約数ペア:

[(1, 20322260), (2, 10161130), (4, 5080565), (5, 4064452), (7, 2903180), (10, 2032226), (14, 1451590), (20, 1016113), (28, 725795), (35, 580636), (49, 414740), (70, 290318), (89, 228340), (98, 207370), (140, 145159), (178, 114170), (196, 103685), (233, 87220), (245, 82948), (356, 57085), (445, 45668), (466, 43610), (490, 41474), (623, 32620), (890, 22834), (932, 21805), (980, 20737), (1165, 17444), (1246, 16310), (1631, 12460), (1780, 11417), (2330, 8722), (2492, 8155), (3115, 6524), (3262, 6230), (4361, 4660)]